They travel to Gethsemane, probably an olive grove which is located at the edge of the Kidron Valley on the eastern side of Jerusalem, and Jesus tells the group to wait for him as he goes and prays. According to John and Luke, Jesus and the disciples had met there often. Mark does not say whether or not Judas was with the group at this point but according to John he left the group during dinner at Jesus' request. He takes Peter, James, and John with him. Along the way he says he is so sad he could die and tells them to keep watch and then walks off by himself and prays.