1 Samuel 10:5-10

5After that thou shalt come to the hill of God, where is the garrison of the Philistines: and it shall come to pass, when thou hast come there to the city, that thou shalt meet a company of prophets coming down from the high place with a psaltery, and a tabret, and a pipe, and a harp, before them; and they shall prophesy: 6And the Spirit of the LORD will come upon thee, and thou shalt prophesy with them, and shalt be turned into another man. 7And let it be, when these signs have come to thee, that thou do as occasion shall serve thee; for God is with thee.12 8And thou shalt go down before me to Gilgal; and, behold, I will come down to thee, to offer burnt offerings, and to sacrifice sacrifices of peace offerings: seven days shalt thou tarry, till I come to thee, and show thee what thou shalt do.

9And it was so, that when he had turned his back to go from Samuel, God gave him another heart: and all those signs came to pass that day.34 10And when they came there to the hill, behold, a company of prophets met him; and the Spirit of God came upon him, and he prophesied among them.