Musannaf Ibn Abi Shaybah 28362 — A man spitting to his right outside

Abu Ishaq says: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to dislike a man spitting to his right, even outside of prayer. Aban asked the narrator: "From whom did you report this?" He said: "From Abd al-Rahman bin Yazid, from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him)."