Sahih Muslim
The Book of Purification (Kitab Al-Taharah)
Book Number: 002 / Hadith Number: 556
Abu Huraira reported the Messenger of Allah (may peace be upon him) saying: None of you must wash in standing water when he is in a state of Junub. And Abu Huraira was asked how it was to be done; he said: It was to be taken out in handfuls.