The Prophet ﷺ stood in prayer through the night repeating a single verse until morning. The verse was "If You punish them, they are Your servants, and if You forgive them, indeed You are the Mighty, the Wise" [Maidah 5:118].
قام النبي ﷺ بآية حتى أصبح يرددها. والآية: {إن تعذبهم فإنهم عبادك وإن تغفر لهم فإنك أنت العزيز الحكيم} [سورة المائدة: ١١٨].
Nasai (1010) and Ibn Majah (1350) both narrated it from the hadith of Yahya bin Saeed Qattan, who said, "Qudama bin Abdullah narrated to us," who said, "Jasrah bint Dajaja narrated to me," who said, "I heard Abu Dharr," and he related it. Hakim also narrated it (1/241) through this route and graded it sahih. Busiri also graded it sahih in Zawaid bin Majah, and Ibn Khuzayma mentioned it (1/271) without a chain of transmission and made the report conditional on its being sahih.Imam Ahmad narrated it (21328) from Muhammad bin Fudayl, who said, "Fulayt Amiri narrated to me," and he is Qudama bin Abdullah, and he added in it, when morning came, I said, "O Messenger of Allah, you kept reciting this verse until morning, bowing with it and prostrating with it!" He said, "I asked my Lord for intercession for my nation, and He granted it to me, and it will be attained, Allah willing, by whoever does not associate anything with Allah."Its chain is hasan because of Jasrah bint Dajaja Amiriyya. Ajli and Ibn Hibban deemed her reliable, and Daraqutni said, "Her hadith is to be considered," meaning in corroborations and supporting narrations. Otherwise she is "acceptable," as Hafiz said in Taqrib. Abu Naeem included her among the companions, which is a mistake on his part.In conclusion, the hadith of Abu Dharr is corroborated by the hadith of Ayesha, and it also has a supporting witness from the hadith of Abu Saeed that follows.As for what is narrated from Abu Saeed Khudri, that the Prophet ﷺ repeated a verse until morning, it contains a man whose identity is unknown. Imam Ahmad narrated it (2/11593) from Zayd bin Hubab, who said, "Ismail bin Muslim Naji informed me," from Abu Nadra, from Abu Saeed Khudri, and he related it.Haythami said in Majma (2/273), "It contains Ismail bin Muslim Naji, and I did not find anyone who wrote a biography of him."I say, Hafiz did not give him a biography in Tajil either, so perhaps he is among the narrators of the Six Books, attributed to someone other than his father, or to something other than his occupation. I fear that he may be Ismail bin Muslim Makki, since he belongs to the same generation, except that he is extremely daif.