en_tn/mat/16/22.md

From that time Jesus started to tell ... Then Peter took him aside

Jesus tells them for the first time that he will die soon. He will tell them the same thing many times after this first time. It is after this first time that Peter took Jesus aside. (See: rc://en/ta/man/translate/writing-background)

Peter took him aside

"Peter spoke to Jesus when no one else could hear them"

May this be far from you

This is an idiom that means "may this never happen." AT: "No" or "Never" or "May God forbid this" (See: rc://en/ta/man/translate/figs-idiom)