Sunan Ibn Majah, Chapter: The Book of the Sunnah

"We used to come across groups of Quraish who would be talking, but they would stop talking (when we approached). We mentioned that to the Messenger of Allah (saw) and he said: 'What is the matter with people who talk, then when they see a man from my family they stop talking? By Allah, faith will not enter a person's heart until he loves them for the sake of Allah and because of their closeness to me.'" (Daif)