"I and Allah's Messenger would perform Ghusl for Janabah from one vessel."
Jami` at-Tirmidhi Book 1, Hadith 62
← Previous Hadith "The Prophet would perform Wudu for every Salat. So during the year of the Conquest, he performed all of the prayers with one Wudu, and he wiped over his Khuff. So Umar said, 'You did something that you have not done before?' He replied: "I did it on purpose."

Jami` at-Tirmidhi Book 1, Hadith 61 Next Hadith → "The Prophet prohibited using the leftover (water) of a woman's Purification."

Jami` at-Tirmidhi Book 1, Hadith 63