URDU TRANSLATION:

Imagine the Prophet(pbuh) forgot 2 rak'at prayer, even a common person does not make such doubt, a common person mixes up with 4 to three or 4 to five but Abu Hurairah tells that the Prophet forgot 2 rak'at.

According to our knowledge Dhul-Yadain, was the companion who talked about the Prophet forgetting the prayer, Dhul-Yadain was martyred long time ago before Abu Hurairah become Muslim.