Musannaf Ibn Abi Shaybah 4061 — Sweeping mosques

Abu Asim al-Thaqafi said: I was with al-Sha'bi in the mosque, and he began bending down. I asked: "O Abu Amr! What are you doing?" He said: "I am picking up bits of reed, stalks of dry grass and other things from the mosque." And Abu Asim was blind.