Jubair b. Mut'im reported:The people contended amongst themselves in the presence of the Messenger of Allah (ﷺ) with regard to bathing. Some of them said: We wash our heads like this and this. Upon this the Messenger (ﷺ) said: As for me I pour three handfuls of water upon my head

Jubair b. Mut'im reported it from the Messenger of Allah (ﷺ) that a mention was made before him about bathing because of sexual intercourse and he said:I pour water over my head thrice