Amr bin Sawad عمرو بن سواد · The Book of Forgetfulness (In Prayer)

It was conveyed to him that the Messenger of Allah (ﷺ) prayed two rak'ahs, and Dhul-Shimalain said something similar to him. (One of the narrators Ibn Shihab said: "Sa'eed bin Al-Musayyab informed me of this hadith from Abu Hurairah." He said: "And Abu Salamah bin 'Abdur Rahman, Abu Bakr bin 'Abdur Rahman, abu Bakr bin 'Abdur Rahman bin Al-Harith and 'Ubaidullah bin 'Abdullah informed me."

'The Messenger of Allah (ﷺ) did not prostrate that day either before the salam or after."

When the Messenger of Allah (ﷺ) sat in a gathering or prayed, he said some words, and 'Aishah asked him about those words. He said: "If he has spoken some good words (and he says this statement of remembrance), it will be a seal for them to preserve them until the Day of Resurrection, and if he has said something other than that, it (these words) will be an expiation for him: 'Subhanak Allahumma wa bihamdika, astaghfiruka wa atubu ilayk…