Musannaf Ibn Abi Shayba 21:66

Yazid ibn Harun narrated to us, from Abd al-Rahman ibn Abi Bakr ibn Abi Mulaykah, from Musa ibn Uqbah, from Nafi, from Ibn Umar, from the Prophet, peace and blessings of Allah be upon him, who said: "A servant does not ask Allah for anything more beloved to Him than that he asks Him for well-being (al-afiyah)."