Musannaf Ibn Abi Shayba 1:1147

Ishaq ibn Mansur narrated to us, he said: Hureym narrated to us, from Yazid ibn Abi Ziyad, from Ibrahim, who said: Alqama and al-Aswad used to perform ghusl with the water of the bathhouse, and they would not boil it for the ghusl.