after they sang the hymn, they go to a hill of olive.
then Jesus said to his disciples: "Your faith all will be shaken. for it is written: I will strike the shepherd and the sheep will be scattered. but after I rise up, I will go before you into Galilee." petrus said to him: "even if their faith all will be shaken, I'm not." Jesus then said to him: "I tell you, today, this night, before the cock crows twice, you will deny me three times." but with more serious petrus said: "though I should die together you, I will not deny you. "another disciples saying that, too."