Abu Hurairah · The Book on Hajj

The Messenger of Allah said: "Whoever performs Hajj for Allah, and he does not have sexual relations nor commit any sin, then his previous sins will be forgiven."

As-S'ab bin Jath-thamah informed him that the Messenger of Allah had passed him at Al-Abwa or Bawaddan. He (As-S'ab) gave him a wild donkey but he refused it. When the Messenger of Allah noticed on his face that he was upset, he said: "We would not refuse you, but we are in Ihram"

That the Prophet said: "Umrah has been entered into Hajj until the Day of Resurrection."