Maliks Muwatta Book 053, Hadith Number 007.

Section : General Section on the Greeting.

Yahya related to me from Malik from Yahya ibn Said that a man greeted Abdullah ibn Umar. He said, "Peace be upon you and the mercy of Allah and his barakat, on and on." Abdullah ibn Umar said to him, "And on you, a thousand times," as if he disliked that.