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]])
Here "hand" refers to power. AT: "where the elders, chief priests, and scribes will cause him to suffer" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here to raise back to life is an idiom for causing someone who has died to become alive again. This can be stated in active form. The elders and chief priests would accuse Jesus so that others would kill him. AT: "scribes. People will then kill him , and on the third day God will make him become alive again" (See: [[rc://en/ta/man/translate/figs-activepassive]])