Musnad Abu Ya'la al-Mawsili 108:103

Ubayd Allah narrated to us, my father narrated to us, Qurra narrated to us, from Abu al-Zubayr, from Jabir, from the Prophet (peace be upon him), who said: "Whoever ascends the mountain pass, the mountain pass of al-Murar, then that which was removed from the Children of Israel shall be removed from him." The first to ascend it were our horses, the horses of the Banu al-Khazraj. Then the people followed one after another. The Messenger of Allah (peace be upon him) said: "All of you are forgiven, except for the owner of the red camel." We said to him: "Come, so that the Messenger of Allah (peace be upon him) may ask for forgiveness for you." He replied: "By Allah, that I find my lost animal is more beloved to me than that your companion should ask for forgiveness for me." And behold, he was a man searching for a lost animal.