اَللَّهُمَّ اجْعَلْهُ حَجًّا مَّبْرُورًا، وَّذَنْۢبًا مَّغْفُوْرًا.

Allaahummaj alhu habbam mabru’ran wa dhambam maghfura.

O Allah, make this Hajj - Hajj Mabrur (full of goodness and free from sins) and forgive all sins.

Reference: Sahih Sanad. (Shuaib al-Arnaut) Musnad 7/150