And He was withdrawn from them about a stone's throw, and He knelt down and prayed, saying, "Father, if it is Your will, take this cup away from Me; nevertheless not My will, but Yours, be done." Then an angel appeared to Him from heaven, strengthening Him. And being in agony, He prayed more earnestly. Then His sweat became like great drops of blood falling down to the ground.
Luke 22:41-45 (NKJV)