Musannaf Ibn Abi Shaybah 9023 — Those who disliked that a man

Umar bin Muhammad bin Hatib said: Once one of the great chiefs of the non-Arabs came to see Sayyiduna Umar (may Allah be pleased with him). He asked about Umar and was told that Umar was outside Madinah. He set out to meet Umar, and met him as he was coming back. The chief bent down and prostrated to Umar (or: bent down to prostrate; the narrator Abdullah was in doubt). Umar said: "Raise your head, for the One, the Subduer."