It is narrated from Sayyiduna Jabir (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "Whoever climbs this mountain pass, the pass of al-Murar, his sins will be wiped away just as the sins of the Children of Israel were wiped away."
Sayyiduna Jabir (may Allah be pleased with them both) said: The first to climb it were our horsemen, those of Banu al-Khazraj; then all the people gathered, and the Prophet (peace and blessings be upon him) said: "All of you have been forgiven except the owner of the red camel." So we said to that man: Come, so that the Messenger of Allah (peace and blessings be upon him) may supplicate for forgiveness for you. He said: Finding my lost thing is dearer to me than that this companion of yours should ask forgiveness for me. And he was searching for something he had lost.
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Qurrah bin Khalid except Mu'adh."
Hadith Referenceالمعجم الأوسط / باب الألف / 2850
Hadith Takhrij«أخرجه مسلم فى «صحيحه» برقم: 2780، والحاكم فى «المستدرك» برقم: 7076، وأبو يعلى فى «مسنده» برقم: 1870»