Musannaf Ibn Abi Shayba 33:704

Shababa ibn Sawwar narrated to us, he said: Shu'bah narrated to us, from al-A'mash, he said: Khaythama said: You and Ibrahim sit in the mosque and people gather around you. I have seen al-Harith ibn Qays, when two men would gather with him, he would stand up and leave them.