Sayyida Umm al-Husayn (may Allah be pleased with her) narrated that I heard the Messenger of Allah (peace and blessings be upon him) say: He (peace be upon him) supplicated three times for those who shaved their heads (during Hajj and Umrah). Each time, it was requested of him: And those who trim their hair (pray for them as well), so on the third time he said: "And for those who trim their hair as well."
Hadith Referenceمسند اسحاق بن راهويه / كتاب المناسك / 314
Hadith Takhrij«بخاري ، كتاب الحج ، باب الحلق والتقصير عند الاحلال ، رقم : 1727 . مسلم ، كتاب الحج ، باب تفضيل الحلق الخ ، رقم : 1301 . سنن ابودواد ، رقم : 1979 . سنن ترمذي ، رقم : 913 . سنن ابن ماجه ، رقم : 3044 . مسند احمد : 402/6 . سنن كبري بيهقي : 134/5»