Make du’aa in general for all the Hajees.
Submitted by Mohammed Gilani on
اللهُمَّ اغْفِرْ لِلْحَاجِّ , وَلِمَنِ اسْتَغْفَرَ لَهُ الْحَاجُّ
O Allâh, forgive the hajees and those for whom the hajee has sought forgiveness
(Musannaf ibn Abi Shaibah, Sunan Kubra of Baihaqi, Hakim)
Umar [RadhiAllaahu Anhu] said that those who go for Hajj as well as those who they seek forgiveness for are forgiven for the remainder of Dhul-Hijjah, Muharram,Safar and ten days of Rabiul Awwal.
(Musannaf ibn Abi Shaibah no. 12657)