1st Samuel 10:7

4 and they will Greet you, and give you two loaves of bread, which you shall receive of their hand.

5 After that you shall come to the hill of God, where is the garrison of the Philistines: and it shall happen, when you are come there to the city, that you shall meet a band of prophets coming down from the high place with a psaltery, and a tambourine, and a pipe, and a harp, before them; and they will be prophesying:

6 and the Spirit of Yahweh will come mightily on you, and you shall prophesy with them, and shall be turned into another man.

7 Let it be, when these signs are come to you, that you do as occasion shall serve you; for God is with you.

8 You shall go down before me to Gilgal; and, behold, I will come down to you, to offer burnt offerings, and to sacrifice sacrifices of peace-offerings: seven days shall you wait, until I come to you, and show you what you shall do.

9 It was so, that when he had turned his back to go from Samuel, God gave him another heart: and all those signs happened that day.

10 When they came there to the hill, behold, a band of prophets met him; and the Spirit of God came mightily on him, and he prophesied among them.