Abu Hurairah narrates:
I heard the Prophet saws say, aa‚¬Å“Whoever performs Hajj and does not commit any Rafath (obscenity) or Fusooq (transgression), he returns (free from sin) as the day his mother bore himaa‚¬?
(Sahih Bukhari).

aa‚¬ËœAmr ibn Al-aa‚¬ËœAas narrates:
aa‚¬Å“When Islam entered my heart, I went to the Messenger of Allah saws and said, aa‚¬ËœGive me your hand so that I may pledge allegiance to you.aa‚¬a„¢ The Prophet spread his hand, but I withdrew mine. He said, aa‚¬ËœWhat is wrong aa‚¬ËœAmr?aa‚¬a„¢ I said, aa‚¬ËœI want to make a condition.aa‚¬a„¢ aa‚¬ËœAnd what is that?aa‚¬a„¢ he said. I said, aa‚¬ËœThat Allah will forgive me.aa‚¬a„¢ Then the Messenger of Allah said, aa‚¬ËœDid you not know that Islam wipes out what came before it, and that Hijrah wipes out what came before it and that Hajj wipes out what came before it!aa‚¬?
(Sahih Muslim).