Musnad Ahmad 33:516

Yunus and others narrated to us, they said: Hammad—meaning Ibn Zayd—narrated to us, Mujalid narrated to us, from ‘Amir al-Sha’bi, from Jabir ibn ‘Abdullah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Do not ask the People of the Book about anything, for they will not guide you, and they have gone astray. For you will either believe in a falsehood or disbelieve in a truth. For if Moses were alive among you, it would not be lawful for him except to follow me."