Abu Hurairah (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: « اللَّهُمَّاغْفِرْلِلْحَاجِّوَلِمَنِاسْتَغْفَرَلَهُالْحَاجُّ » "O Allah, forgive the pilgrims and also forgive those for whom the pilgrim seeks forgiveness."
Hadith Referenceصحيح ابن خزيمه / كتاب: المناسك / 2516