At that time the Spirit of the LORD will come upon you with power, and you will prophesy with them. You will be changed into a different person.
After these signs take place, do whatever you think is best, for God will be with you.
Then go down to Gilgal ahead of me and wait for me there seven days. I will join you there to sacrifice burnt offerings and peace offerings. When I arrive, I will give you further instructions."
As Saul turned and started to leave, God changed his heart, and all Samuel's signs were fulfilled that day.
When Saul and his servant arrived at Gibeah, they saw the prophets coming toward them. Then the Spirit of God came upon Saul, and he, too, began to prophesy.
When his friends heard about it, they exclaimed, "What? Is Saul a prophet? How did the son of Kish become a prophet?"
But one of the neighbors responded, "It doesn't matter who his father is; anyone can become a prophet." So that is the origin of the saying "Is Saul a prophet?"
References for 1 Samuel 10:12
When Saul had finished prophesying, he climbed the hill to the altar.
"Where in the world have you been?" Saul's uncle asked him."We went to look for the donkeys," Saul replied, "but we couldn't find them. So we went to the prophet Samuel to ask him where they were."
"Oh? And what did he say?" his uncle asked.
"He said the donkeys had been found," Saul replied. But Saul didn't tell his uncle that Samuel had anointed him to be king.
Later Samuel called all the people of Israel to meet before the LORD at Mizpah.
And he gave them this message from the LORD, the God of Israel: "I brought you from Egypt and rescued you from the Egyptians and from all of the nations that were oppressing you.