Musannaf Ibn Abi Shayba 1:315

Ghundar narrated to us, from Shu'bah, who said: I asked al-Hakam, "I performed ablution with the leftover water of a donkey, then I prayed." He said, "Do not repeat [the prayer]." And I asked Hammad, and he said, "It is more beloved to me that you repeat [the prayer]."