Musannaf Ibn Abi Shayba 24:102

Yazid ibn Harun narrated to us, he said: Muhammad ibn Talha informed us, he said: Ibrahim ibn Abd al-A’la al-Ju’fi narrated to us, he said: Al-Hajjaj sent for Suwayd ibn Ghafala and said: "Will you not lead your people in prayer? And when you return, come to us." He said: I said, "Hearing and obedience."