Sahih Muslim Book 3, Hadith Number 621.

Chapter : Bathing after sexual intercourse or seminal emission.

This Hadith is narrated by A’mash with the same chain of transmitters, but in the Hadith narrated by Yahya b. Yahya and Abu Kuraib there is no mention of: “Pouring of three handfuls of water on the head.” and in the Hadith narrated by Waki’ all the features of ablution have been recorded: rinsing (of mouth), snuffing of water (in the nostrils); and in the Hadith transmitted by Abu Mu’awyia, there is no mention of a towel.