Maliks Muwatta Book 45, Hadith Number 1.
Section : The Dua for Madina and Its People.
Yahya ibn Yahya related to me from Ishaq ibn Abdullah ibn Abi Talha al-Ansari from Anas ibn Malik that the Messenger of Allah, may Allah bless him and grant him peace, said, “O Allah! Bless them in their measure, and bless them in their sa and mudd.” He meant the people of Madina.