AHMAD 21140:
from Ubay b. Kaʿb —
[Machine] The Prophet ﷺ performed the Fajr prayer with us and left out a verse. Then Ubay came and missed some of the prayer. When he finished, he said, "O Messenger of Allah, was this verse abrogated or did you forget it?" He ﷺ said, "No, I forgot it."
أحمد ٢١١٤٠:
عن ابي بن كعب —
صَلَّى بِنَا النَّبِيُّ ﷺ الْفَجْرَ وَتَرَكَ آيَةً فَجَاءَ أُبَيٌّ وَقَدْ فَاتَهُ بَعْضُ الصَّلَاةِ فَلَمَّا انْصَرَفَ قَالَ يَا رَسُولَ اللهِ نُسِخَتْ هَذِهِ الْآيَةُ أَوْ أُنْسِيتَهَا؟ قَالَ لَا بَلْ أُنْسِيتُهَا
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