حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ صلى الله عليه وسلم بِمَعْنَى حَدِيثِ الْقَعْنَبِيِّ ‏.‏ قَالَ وَنَسِيتُ أَنْ أَسْأَلَهُ كَمْ صَلَّى ‏.‏

This tradition has also been transmitted by Ibn ‘Umar through a different chain of narrators like the one narrated by Al Qa’nabi . This version has “ I forgot to ask the number of rak’ahs he offered. Translation Not Available

Book Ref: Sunan Abi Dawud Book 11 Hadith 2025
Web Ref:  Sunan Abi Dawud Book 10 Hadith 2020