Musannaf Ibn Abi Shaybah 34421 — Reports on Ammar bin Yasir

Abu Layla al-Kindi (may Allah have mercy on him) said: Sayyiduna Khabbab (may Allah be pleased with him) came to Sayyiduna Umar (may Allah be pleased with him). He (may Allah be pleased with him) said: "Come near, for no one has more right to this seat than you except Sayyiduna Ammar (may Allah be pleased with him)." Then Sayyiduna Khabbab (may Allah be pleased with him) showed the marks on his back of the torments of the polytheists.