Abu Hurairah (May Allah be pleased with him) reported
that Messenger of Allah (sallallaho alaihi wa sallam) has said:
"Whoever performs Hajj for the sake of pleasing Allah (Jalla Jalalahu)
and therein utters no word of evil, nor commits any evil deed,
then he returns from Hajj as pure and free from sins as
on the day on which his mother gave birth to him.''
[Al-Bukhari and Muslim].