Musnad Ahmad 5:248

Abdullah narrated to us, Abd al-A’la ibn Hammad narrated to me, Dawud ibn Abd al-Rahman al-Attar narrated to us, Abu Abd Allah Maslamah al-Razi narrated to us, from Abu Amr al-Bajali, from Abd al-Malik ibn Sufyan al-Thaqafi, from Abu Ja’far Muhammad ibn Ali, from Muhammad ibn al-Hanafiyyah, from his father, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Verily, Allah the Exalted loves the servant who is frequently tempted and frequently repentant."