Musnad Abu Ya'la al-Mawsili 160:76

Abbas ibn al-Walid al-Narsi narrated to us, Yahya ibn Sa'id narrated to us, Ubayd Allah ibn Amr narrated to us, Muhammad ibn Yahya ibn Sa'id narrated to us, my father narrated to us, Ubayd Allah ibn Umar narrated to us, from Sa'id ibn Abi Sa'id, from his father, from Abu Hurayrah, who said: It was said, "O Messenger of Allah, who is the most noble of people?" He said, "The most God-fearing of them." They said, "It is not about this that we are asking you."