'Prophets' in the Bible

"After that you shall come to the hill of God, where is the garrison of the Philistines: and it shall happen, when you have 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:

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.

It happened, when all who knew him before saw that, behold, he prophesied with the prophets, then the people said one to another, "What is this that is come to the son of Kish? Is Saul also among the prophets?"

One of the same place answered, "Who is their father?" Therefore it became a proverb, "Is Saul also among the prophets?"

Saul sent messengers to take David: and when they saw the company of the prophets prophesying, and Samuel standing as head over them, the Spirit of God came on the messengers of Saul, and they also prophesied.

He also stripped off his clothes, and he also prophesied before Samuel, and lay down naked all that day and all that night. Therefore they say, "Is Saul also among the prophets?"

When Saul inquired of Yahweh, Yahweh didn't answer him, neither by dreams, nor by Urim, nor by prophets.

Samuel said to Saul, "Why have you disturbed me, to bring me up?" Saul answered, "I am very distressed; for the Philistines make war against me, and God has departed from me, and answers me no more, neither by prophets, nor by dreams. Therefore I have called you, that you may make known to me what I shall do."