Musnad Ahmad 1153:540

Muhammad ibn Mus'ab narrated to us, he said: Al-Awza'i narrated to us, from Al-Zuhri, from 'Urwah, from 'Aishah, from the Prophet, peace and blessings of Allah be upon him, who said: "Indeed, Allah, the Almighty and Majestic, loves gentleness in all matters."