Anas said:

The Messenger of Allah ﷺ entered upon Umm Haram. The people (in her house) brought some cooking oil dates to him. He said; Put it (dates) back in its container and return it (cooking oil) to its bag, because I am keeping fast. He then stood and led us in prayer two Rak’ahs of supererogatory prayer. Then Umm Sulaim and Umm Haram stood behind us (i.e., the men). Thabit (the narrator) said: I understand that Anas said; he (the prophet) made me stand on his right side.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، أَخْبَرَنَا ثَابِتٌ، عَنْ أَنَسٍ، أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ عَلَى أُمِّ حَرَامٍ فَأَتَوْهُ بِسَمْنٍ وَتَمْرٍ فَقَالَ
" رُدُّوا هَذَا فِي وِعَائِهِ وَهَذَا فِي سِقَائِهِ فَإِنِّي صَائِمٌ " . ثُمَّ قَامَ فَصَلَّى بِنَا رَكْعَتَيْنِ تَطَوُّعًا فَقَامَتْ أُمُّ سُلَيْمٍ وَأُمُّ حَرَامٍ خَلْفَنَا . قَالَ ثَابِتٌ وَلاَ أَعْلَمُهُ إِلاَّ قَالَ أَقَامَنِي عَنْ يَمِينِهِ عَلَى بِسَاطٍ .