Hadith on Quran: Ayat al-Kursi greatest verse in the Quran

Ubayy ibn Ka’b reported: The Messenger of Allah, peace and blessings be upon him, said, “O Abu Mundhir, do you know which verse in the book of Allah with you is greatest?” I recited the verse of the throne, “Allah, there is no God but him, the Living, the Sustainer,” (2:255). The Prophet struck me on the chest and he said, “By Allah, Abu Mundhir, rejoice in this knowledge!”

Source: Ṣaḥīḥ Muslim 810

Grade: Sahih (authentic) according to Muslim

عَنْ أُبَيِّ بْنِ كَعْبٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَا أَبَا الْمُنْذِرِ أَتَدْرِي أَيُّ آيَةٍ مِنْ كِتَابِ اللَّهِ مَعَكَ أَعْظَمُ قَالَ قُلْتُ اللَّهُ لَا إِلَهَ إِلَّا هُوَ الْحَيُّ الْقَيُّومُ قَالَ فَضَرَبَ فِي صَدْرِي وَقَالَ وَاللَّهِ لِيَهْنِكَ الْعِلْمُ أَبَا الْمُنْذِرِ

810 صحيح مسلم كتاب صلاة المسافرين وقصرها باب فضل سورة الكهف وآية الكرسي