And he was withdrawn from them about a stone's cast, and kneeled down and prayed, saying, "Father, if thou be willing, remove this cup from me: nevertheless not my will, but thine be done."
    And there appeared an angel unto him from heaven, strengthening him. And being in agony he prayed more earnestly: and his sweat was as it were great drops of blood falling down to the ground.
                            St. Luke: 22. 41-44