2:255
ٱللَّهُ لَآ إِلَٰهَ إِلَّا هُوَ ٱلْحَىُّ ٱلْقَيُّومُ ۚ لَا تَأْخُذُهُۥ سِنَةٌۭ وَلَا نَوْمٌۭ ۚ لَّهُۥ مَا فِى ٱلسَّمَٰوَٰتِ وَمَا فِى ٱلْأَرْضِ ۗ مَن ذَا ٱلَّذِى يَشْفَعُ عِندَهُۥٓ إِلَّا بِإِذْنِهِۦ ۚ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ ۖ وَلَا يُحِيطُونَ بِشَىْءٍۢ مِّنْ عِلْمِهِۦٓ إِلَّا بِمَا شَآءَ ۚ وَسِعَ كُرْسِيُّهُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضَ ۖ وَلَا يَـُٔودُهُۥ حِفْظُهُمَا ۚ وَهُوَ ٱلْعَلِىُّ ٱلْعَظِيمُ
Allah - there is no deity except Him, the Ever-Living, the Sustainer of [all] existence. Neither drowsiness overtakes Him nor sleep. To Him belongs whatever is in the heavens and whatever is on the earth. Who is it that can intercede with Him except by His permission? He knows what is [presently] before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills. His Kursi extends over the heavens and the earth, and their preservation tires Him not. And He is the Most High, the Most Great.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Virtue of Ayat Al-Kursi
This is Ayat Al-Kursi and tremendous virtues have been associated with it, for the authentic Hadith describes it as `the greatest Ayah in the Book of Allah.' Imam Ahmad recorded that `Ubayy bin Ka`b said that the Prophet asked him about the greatest Ayah in the Book of Allah, and `Ubayy answered, "Allah and His Messenger know better." When the Prophet repeated his question several times, `Ubayy said, "Ayat Al-Kursi." The Prophet commented,
«لِيَهْنِكَ الْعِلْمُ أَبَا الْمُنْذِرِ، وَالَّذِي نَفْسِي بِيَدِهِ، إِنَّ لَهَا لِسَانًا وَشَفَتَيْنِ، تُقَدِّسُ الْمَلِكَ عِنْدَ سَاقِ الْعَرْش»
(Congratulations for having knowledge, O Abu Al-Mundhir! By He in Whose Hand is my soul! This Ayah has a tongue and two lips with which she praises the King (Allah) next to the leg of the Throne.)
This Hadith was also collected by Muslim, but he did not include the part that starts with, "By He in Whose Hand..."
Imam Ahmad recorded that Abu Ayyub said that he had some dates and a Ghoul used to take some, and he complained to the Prophet. The Prophet said to him, "When you see her, say, `In the Name of Allah, answer to the Messenger of Allah ﷺ'." Abu Ayyub said that when she came again, he said these words and he was able to grab her. She begged, "I will not come again," so Abu Ayyub released her. Abu Ayyub went to the Prophet and the Prophet asked him, "What did your prisoner do" Abu Ayyub said, "I grabbed her and she said twice, `I will not come again,' and I released her." The Prophet said, "She will come back." Abu Ayyub said, "So I grabbed her twice or three times, yet each time I would release her when she vowed not to come back. I would go to the Prophet who would ask me, `What is the news of your prisoner' I would say, `I grabbed her, then released her when she said that she would not return.' The Prophet would say that she would return. Once, I grabbed her and she said, `Release me and I will teach you something to recite so that no harm touches you, that is, Ayat Al-Kursi.' Abu Ayyub went to the Prophet and told him, and the Prophet said, "She is liar, but she told the truth." At-Tirmidhi recorded this Hadith in the chapter of the virtues of the Qur'an and said, "Hasan Gharib." In Arabic, `Ghoul' refers to the Jinn when they appear at night.