It was narrated that al-"Abbas bin ‘Abdul-Muttalib said:

I said: O Messenger of Allah, when Quraish meet one another, they meet with a cheerful attitude, but when they meet us, they meet us with expressions we do not recognise. The Prophet (ﷺ) got very angry and said: “By the One in Whose hand is my soul, faith will not enter a man"s heart unless he loves you for the sake of Allah and Iłis Messenger."