Musannaf Ibn Abi Shayba 1:837

Narrated to us Sharik, from Hurayth, from al-Sha'bi, from Masruq, from Aisha, she said: The Prophet, peace and blessings of Allah be upon him, would perform ghusl (ritual bath) from janabah (major ritual impurity), then he would warm himself with me before I performed ghusl.