Musannaf Ibn Abi Shaybah 32650 — Reports on talk about rulers

Qudamah bin Attab said: I saw Sayyiduna Ali (may Allah be pleased with him) delivering a sermon when a man came to him and said: "O Commander of the Believers! Go to the aid of Bakr bin Wa'il, for Banu Tamim have struck them down at al-Kunasah." Sayyiduna Ali (may Allah be pleased with him) sighed and then turned back to his sermon. Then a second person came and said the same, and he sighed again. Then he came a third or fourth time and repeated the same words, and he said: "O Shaddad! Now you have dealt truthfully with me. Go to Bakr bin Wa'il and Banu Tamim and separate them."