It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "By Allah! I shall certainly fight Quraysh. By Allah! I shall certainly fight Quraysh." Then the third time he said: "In sha' Allah (if Allah wills)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11692