Musannaf Ibn Abi Shaybah

Hazrat Kulayb says that I came to Hazrat Umar during the time of Hajj, so I called out to him from behind the tent, "Beware! I am so-and-so, son of so-and-so, a resident of the tribe of Jarmi, and indeed our nephew is in the captivity of such-and-such tribe, and we have presented before them the decision of the Messenger of Allah, peace and blessings be upon him, but they have refused to accept it." Kulayb says: Hazrat Umar lifted one side of the tent and then said: "Do you recognize your companion?" So Kulayb said: "Yes! He is right in front." Then Umar said: "Both of you go to him until the decision of the Messenger of Allah, peace and blessings be upon him, is enforced for you." Kulayb says: We were saying that the decision was of four camels.