Sunan Abi Dawud 21949
In-book no 1445حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، وَمُسَدَّدٌ، قَالاَ حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، عَنْ مُحَمَّدٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّهُ سُئِلَ هَلْ قَنَتَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي صَلاَةِ الصُّبْحِ فَقَالَ نَعَمْ . فَقِيلَ لَهُ قَبْلَ الرُّكُوعِ أَوْ بَعْدَ الرُّكُوعِ قَالَ بَعْدَ الرُّكُوعِ . قَالَ مُسَدَّدٌ بِيَسِيرٍ .
Muhammad reported: Anas b. Malik was asked whether the Messenger of Allah (ﷺ) had recited supplication in the dawn prayer. He replied: Yes. He was again asked whether before bowing or after bowing. He said after bowing. This version of Musaddad adds the words: "For a short period."