Musnad Abu Ya'la al-Mawsili 109:37

Ahmad ibn Isa narrated to us, Abdullah ibn Wahb narrated to us, he said: Amr ibn al-Harith informed me, from Abd Rabbih ibn Sa'id, from Abu al-Zubayr, from Jabir, from the Messenger of Allah (may Allah bless him and grant him peace), who said: "For every disease there is a remedy. So when the remedy of the disease is attained, it heals by the permission of Allah."