Musannaf Ibn Abi Shaybah 32722 — Reports on talk about rulers

Amr bin Utbah al-Sulami said: Sayyiduna al-Ash'ath bin Qays (may Allah be pleased with him) came into the mosque and sat with Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him), and he placed one of his feet on the other. Sayyiduna Ka'b (may Allah be pleased with him) said to him: "Put it down, for this posture is not fitting for a human being."