'Supplication' in the Bible

And he turneth and sendeth a third head of fifty and his fifty, and the third head of fifty goeth up, and cometh in, and boweth on his knees over-against Elijah, and maketh supplication unto him, and speaketh unto him, 'O man of God, let be precious, I pray thee, my soul and the soul of thy servants -- these fifty -- in thine eyes.