The Glorious Qur’an is the miracle revealed by Allah to His Messenger Muhammad (peace and blessings be upon him) in the language of his people, the Arabs, who were the masters of the Arabic language. It was a challenge for them to produce the like of the shortest surah or chapter of it. Being the masters of eloquence and rhetoric, they failed to produce anything like it.

Imam Ibn Kathir (may Allah have mercy on him) said in his Tafseer of Ayat Al-Kursi:

This is Ayat Al-Kursi, which has a high status. It was reported from the Messenger (peace and blessings be upon him) that “It is the greatest verse in the Book of Allah.” It was narrated from Ubayy ibn Ka`b that the Prophet (peace and blessings be upon him) asked him which verse in the Book of Allah was the greatest. He said, “Allah and His Messenger know best.” He repeated it several times, then he said, “Ayat Al-Kursi.” The Prophet (peace and blessings be upon him) said, “Congratulations upon your knowledge, Abul-Mundhir. By the One in Whose hand is my soul, it has a tongue and two lips, and it glorifies the Sovereign (i.e., Allah) at the foot of the Throne.”

It was narrated from `Abdullah ibn Ubayy ibn Ka`b that his father told him that he had a vessel in which he kept dates. He used to check on it and found that the number was decreasing. So he kept guard on it one night and saw a beast that looked like an adolescent boy. He said: I greeted him with salams and he returned my greeting. Then I asked him, “What are you, a jinn or a human?” He said, “A jinn.” I said to him, “Show me your hand.” So he showed me his hand, and it looked like a dog’s paw with dog’s fur. I said, “Do all the jinn look like this?” He said, “I know no one among the jinn who is stronger than me.” I said, “What made you do what you did [i.e., taking the dates]?” He said, “We heard that you are a man who loves charity, and we wanted to have some of your food.” Ubayy asked him, “What will protect us from you?” He said, “This verse, Ayat Al-Kursi.” Then the next day he [Ubayy] went to the Prophet (peace and blessings be upon him) and told him (about what had happened) and he said, “The evil one spoke the truth.”

Imam Ahmad narrated: Muhammad ibn Ja`far told us, `Uthman ibn `Itab told us, he said: I heard Abu As-Sulayl saying: A man from among the Companions of the Prophet (peace and blessings be upon him) addressed the people until a large number had gathered around him, then he climbed onto the roof of a house and addressed the people, saying: “The Messenger of Allah (peace and blessings be upon him) said, ‘Which verse of the Qur’an is the greatest?’ A man said, [Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists…] (Al-Baqarah: 255).’ He said: He put his hand between my shoulders and I felt coolness in the centre of my chest, [or he said] he put his hand on the centre of my chest and I felt coolness between my shoulders, and he said, ‘Congratulations on your knowledge, Abul-Mundhir.'”

Al-Bukhari narrated that Abu Hurayrah said: The Messenger of Allah (peace and blessings be upon him) appointed me to guard the Ramadan Zakah. Someone came and started taking some of the food. I grabbed hold of him and said, “I am going to take you to the Messenger of Allah (peace and blessings be upon him)!” He said, “Let me be, for I am in need and I have children and I am in great need.” So I let him go. The following morning, the Prophet (peace and blessings be upon him) said, “Abu Hurayrah, what did your prisoner do last night?” I said, “Messenger of Allah, he complained of being in great need and having children to look after, so I took pity on him and let him go.” He said, “But he was lying, and he will be back.” So I knew that he would come back, because of what the Messenger of Allah (peace and blessings be upon him) had said. I lay in wait for him, and he came and started taking some of the food. I grabbed hold of him and said, “I am going to take you to the Messenger of Allah (peace and blessings be upon him)!” He said, “Let me be, for I am in need and I have children. I will not come back again.” So I took pity on him and let him go. The following morning, the Prophet (peace and blessings be upon him) said, “Abu Hurayrah, what did your prisoner do last night?’ I said, “Messenger of Allah, he complained of being in great need and having children to look after, so I took pity on him and let him go.” He said, “But he was lying, and he will be back.” So I lay in wait for him on the third night, and he came and started taking some of the food. I grabbed hold of him and said, “I am going to take you to the Messenger of Allah (peace and blessings be upon him)! This is the third and last time. You said that you would not come back, then you did come back.” He said, “Let me go, and I will teach you some words by which Allah will benefit you.” I said, “What are they?” He said, “When you lie down in your bed, recite  Ayat Al-Kursi– [Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists…] (Al-Baraqah: 255) until the end of the verse, then you will have a protector from Allah and no devil will come near you until morning comes.” Then I let him go. The following morning, the Prophet (peace and blessings be upon him) said, “What did your prisoner do last night?” I said, “Messenger of Allah, he claimed that he would teach me some words by which he said Allah would benefit me, then I let him go.” He asked, “What are they?” I said, “He told me, when you lie down in your bed, recite Ayat Al-Kursi from the beginning to the end of the verse- [Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists…] (Al-Baraqah: 255). And he told me, ‘You will have a protector from Allah and no devil will come near you until morning comes.’ The Prophet (peace and blessings be upon him) said, “He indeed told you the truth, although he is a liar. Do you know who you have been speaking with for the past three nights, Abu Hurayrah?” I said, “No.” He said, “That was a devil.”

It was narrated from Abu Hurayrah that the Messenger of Allah (peace and blessings be upon him) said: “In Surat Al-Baqarah there is a verse which is the best of all the verses of the Qur’an. It is never recited in a house but Ash-Shaytan leaves: Ayat Al-Kursi.”

Concerning the fact that it includes the greatest name of Allah, Imam Ahmad said: It was narrated that Asma’ bint Yazeed ibn As-Sakan said: I heard the Messenger of Allah (peace and blessings be upon him) say about these two verses-[Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists…] (Al-Baraqah: 255) and [Alif. Laam. Meem. Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists] (Aal `Imran: 1-2)- that they contain the greatest name of Allah. (Reported by Abu Dawud and At-Tirmidhi.)

It was narrated in a marfu` report (one that is traced all the way back to the Prophet [peace and blessings be upon him]) that Abu Umamah said: “The greatest name of Allah, which if He is called by it, He responds, is in three surahs: Al-Baqarah, Aal `Imran and Ta-Ha.” Hisham ibn `Ammar, the khateeb of Damascus, said: “In Al-Baqarah, it is [Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exist] (Al-Baraqah: 255). In Aal `Imran it is[Alif. Laam. Meem. Allah! None has the right to be worshiped but He, the Ever-Living, the One Who sustains and protects all that exists’] (Aal `Imran: 1-2). And in Ta-Ha it is [And (all) faces shall be humbled before (Allah), the Ever- Living, the One Who sustains and protects all that exists] (Ta-Ha: 111).

Concerning the virtue of reciting this verse after the prescribed Prayers, it was narrated that Abu Umamah said: The Messenger of Allah (peace and blessings be upon him) said: “Whoever recites Ayat Al-Kursi immediately after each prescribed Prayer, there will be nothing standing between him and his entering Paradise except death.” (Reported by An-Nasa’i and Ibn Hibban.)