'Aishah said:

"I noticed that the Messenger of Allah ﷺ was missing from bed, so I started to look for him, and I thought that he had gone to one of his concubines. Then my hand fell on him when he was prostrating and saying: "Allahummaghfirli ma asrartu wa ma a'lant (O Allah, forgive me for what (sin) I have concealed and what I have done openly).'"

أَخْبَرَنَا مُحَمَّدُ بْنُ قُدَامَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ هِلاَلِ بْنِ يِسَافٍ، قَالَ قَالَتْ عَائِشَةُ رضى الله عنها فَقَدْتُ رَسُولَ اللَّهِ ﷺ مِنْ مَضْجَعِهِ فَجَعَلْتُ أَلْتَمِسُهُ وَظَنَنْتُ أَنَّهُ أَتَى بَعْضَ جَوَارِيهِ فَوَقَعَتْ يَدِي عَلَيْهِ وَهُوَ سَاجِدٌ وَهُوَ يَقُولُ " اللَّهُمَّ اغْفِرْ لِي مَا أَسْرَرْتُ وَمَا أَعْلَنْتُ " .