Whoever performs Hajj and does not commit obscenity or commit any evil therein will go back (free of sin) as on the day his mother gave birth to him. [Sahih/Authentic] - [Al-Bukhari and Muslim]

"مَنْ حَجَّ، فلَمْ يَرْفُثْ، وَلم يَفْسُقْ، رَجَعَ كَيَوْمَ وَلَدْتُهُ أُمُّهُ». [صحيح.] - [متفق عليه.]"