Al-Adab Al-Mufrad #128

Mujahid said, "I was with 'Abdullah ibn 'Amr while his slave was skinning a sheep. He said, 'Boy! When you finish, start with the Jewish neighbour.' A man there exclaimed, 'Jewish? May Allah correct you!' He replied, 'I heard the Messenger of Allah, may Allah bless him and grant him peace, recommend that we treat our neighbours well until we feared (or we thought) that he would order us to make them our heirs.'"