Musnad Abi Ya'la 5606 — I was sitting with Sayyiduna Abdullah bin Umar

Khalid bin Kaysan (may Allah have mercy on him) narrates: I was sitting with Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) when a young man passed by, trailing his garment, and Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said to me, "Call him, call him." The narrator says: I called him, and he (may Allah be pleased with him) said to him, "Raise your lower garment." So he raised it to above his heel, whereupon Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: "This is how the lower garment of the Messenger of Allah (peace and blessings be upon him) was," or (with doubt) he said: "This is how the Messenger of Allah (peace and blessings be upon him) ordered us to wear the lower garment."