Yahya ibn Yahya related to me from Ishaq ibn Abdullah ibn AbiTalha al-Ansari from Anas ibn Malik that the Messenger of Allah, mayAllah bless him and grant him peace, said, "O Allah! Bless them intheir measure, and bless them in their sa and mudd." He meant thepeople of Madina.
USC-MSA web (English) reference: Book 45, Hadith 1
Arabic reference: Book 45, Hadith 1601