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.
عَنِ النَّبِيِّ ﷺ بِمَعْنَى حَدِيثِ الْقَعْنَبِيِّ قَالَ وَنَسِيتُ أَنْ أَسْأَلَهُ كَمْ صَلَّى