Musannaf Ibn Abi Shayba 28:1155

Al-Fadl ibn Dukayn narrated to us, he said: Hanash ibn al-Harith narrated to us, from his father, who said: When Umar sent us to Kufa, he walked with us for an hour of the day. He bade us farewell and prayed for us, then he sat down shaking the dust from his feet, then he returned.