Sahih Bukhari
Pilgrims Prevented from Completing the Pilgrimmage
Volume: 003 / Book Number: 028 / Hadith Number: 46
Narrated Abu Huraira:
The Prophet said, "Whoever performs Hajj to this Ka'ba and does not approach his wife for sexual relations nor commit sins (while performing Hajj), he will come out as sinless as a new-born child, (just delivered by his mother)."