The Messenger of Allah ﷺ said, "Whoever climbs this mountain pass, the pass of Murar, will have his sins removed just as the sins were removed from the Children of Israil."He said, the first to climb it were our horsemen, the horsemen of Banu Khazraj, then the rest of the people followed.The Messenger of Allah ﷺ said, "All of you are forgiven, except the owner of the red camel."So we went to him and said, "Come, the Messenger of Allah ﷺ will seek forgiveness for you."He replied, "By Allah, finding my lost animal is dearer to me than your companion seeking forgiveness for me."He was a man searching for a stray animal of his.
قال رسول الله ﷺ: من يصعد الثنية، ثنية المرار، فإنه يحط عنه ما حط عن بني إسرائيل قال: فكان أول من صعدها خيلنا، خيل بني الخزرج، ثم تتام الناس، فقال رسول الله ﷺ: و كلكم مغفور له، إلا صاحب الجمل الأحمر فأتيناه فقلنا له: تعال، يستغفر لك رسول الله ﷺ فقال: والله لأن أجد ضالتي أحب إلي من أن يستغفر لي صاحبكم، قال وكان رجل ينشد ضالة له.
Muslim narrated it in the Characteristics of the Hypocrites (2780), from Ubaydullah bin Muaz Anbari, who said, my father narrated to us, Qurra bin Khalid narrated to us, from Abu Zubayr, from Jabir bin Abdullah, who said, then he mentioned it.