Musannaf Ibn Abi Shaybah

Hazrat Jubair bin Mut’im narrates that some people had a disagreement about the ritual bath (ghusl janabat) in the presence of the Noble Prophet (peace and blessings be upon him). One man said, “I wash my head such and such amount.” The Prophet (peace and blessings be upon him) said, “I pour three handfuls of water on my head.”