Musnad Ahmad 675:7

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Muhammad—meaning Ibn Abi Layla—from his brother 'Isa, from 'Abdullah ibn 'Ukaym, from the Prophet, peace and blessings of Allah be upon him, that he said: "Whoever hangs something [as an amulet or charm], he is entrusted to it."