Sahih Muslim
The Book of Faith (Kitab Al-Iman)
Book Number: 001 / Hadith Number: 417
'Amr b. 'As reported: I heard it from the Messenger of Allah (may peace be upon him) quite audibly and not secretly: Behold! the posterity of my fathers, that is, so and so, are not my friends. Verily Allah and the pious believers are my friends.