Musnad Abu Ya'la al-Mawsili 145:5

Muhammad ibn al-Muthanna Abu Musa narrated to us, Zakariyya ibn Yahya al-Ta'i Abu Malik narrated to us, Shu'ayb ibn al-Habhab narrated to us, from Anas ibn Malik, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The most perfect of people in faith are the best of them in character. Indeed, good character surely reaches the rank of fasting and prayer."