Musnad Abu Ya'la al-Mawsili 149:30

Mus'ab narrated to us, Bishr ibn al-Sari narrated to me, from Mus'ab ibn Thabit, from Hisham ibn 'Urwah, from his father, from 'Aishah, that the Prophet, may Allah bless him and grant him peace, said: "Indeed, Allah loves that if one of you performs a deed, he perfects it."