'Burnt offerings' in the Bible

And as soon as he had made an end of offering burnt offerings behold, Samuel came. And Saul went against him, to salute him. Then said Samuel to Saul, "What hast thou done?"

then said I, 'The Philistines shall come down upon me to Gilgal, before I have made supplication unto the LORD.' And therefore I took a courage with me and offered burnt offerings."