Musannaf Ibn Abi Shayba 1:355

Waki’ narrated to us, from ‘Imran bin Hudayr, from Sawadah bin ‘Asim, who said: I reached Al-Hakam Al-Ghifari while he was at Al-Mirbad, and he was forbidding them from [using] the leftover water of a woman’s purification. So I said: "How excellent is the yellowness of her forearms, how excellent is such and such." He took something and threw it at me, and said: "For you and for your companions."