From Sahih Muslim (Hadith 4651):
Abu Ishiq has narrated a similar tradition through a different chain of transmitters and has added:He (the Messenger of Allah) loved to repeat the supplication thrice. He was saying: O Allah, it is for Thee to deal with the Quraish (repeating these words thrice). And among the Quraish, he mentioned (the names of) al-Walid b. 'Utba and Umayya b. Khalaf. (The narrator says there is no doubt about the names of these persons but he has forgotten the name of the seventh man)
Reference: Muslim 4651