The ruling on saying "And upon you" in returning the greeting to a Muslim

Question:
Is it permissible to return the greeting by saying: "And upon you," or is this specific to the People of the Book?

Answer:
And upon you be peace.
Q: I said on Thursday that among the benefits of the hadith "The one whose prayer is defective" is that it is permissible to say "And upon you"?
A: Because the Messenger (peace and blessings be upon him) said to the one whose prayer was defective: .
Q: Is there not an addition that he returned the greeting?
A: Yes, he returned the greeting to him, but this narration is called a return, and the beginning is implied, meaning: "The peace," so this is called a return, but if one completes it, it is better.