846/1106 (Sahih) From Abdullah ibn Umar; he said: The Messenger of Allah, peace and blessings be upon him, said: "When one of the Jews greets you, he only says: 'As-sam upon you.' So say: 'And upon you.'"

847/1107 (Hasan) from Ibn Abbas who said: "Return the greeting of peace to whoever it may be, whether he is a Jew, a Christian, or a Magian; that is because Allah says: ?And when you are greeted with a greeting, greet in return with what is better than it, or at least return it? [النساء: 86] ."