حَدَّثَنَا هَارُونُ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا عَبْدُ الصَّمَدِ، عَنْ هَمَّامٍ، عَنْ قَتَادَةَ، بِهَذَا الْحَدِيثِ وَقَالَ ‏"‏ تِسْعَ سِنِينَ ‏"‏ ‏.‏ قَالَ أَبُو دَاوُدَ وَقَالَ غَيْرُ مُعَاذٍ عَنْ هِشَامٍ ‏"‏ تِسْعَ سِنِينَ ‏"‏ ‏.‏

The tradition mentioned above has also been transmitted by Qatadah through a different chain of narrators. This version has "nine years". Abu Dawud said: The other narrators mentioned "nine years" from Hisham except Mu'adh. Translation Not Available

Book Ref: Sunan Abi Dawud Book 38 Hadith 4287
Web Ref:  Sunan Abi Dawud Book 37 Hadith 4274