Musannaf Ibn Abi Shayba 1:533

Hushaym narrated to us, he said: Mughira informed us, from Ibrahim, that Alqama and Al-Aswad were with Abdullah while he was heading to the mosque. He was met with a bowl of tharid while he was in the courtyard. He said: So he sat and ate from it, he, Alqama, and Al-Aswad. He said: Then he called for water, so he rinsed his mouth and washed his hands of the grease of the meat. Then he entered and prayed.