'Band Of Prophets' in the Bible

After that thou shalt come to the hill of God, where is the garrison of the Philistines: and it shall come to pass, when thou art come thither to the city, that thou shalt meet a band of prophets coming down from the high place with a psaltery, and a timbrel, and a pipe, and a harp, before them; and they will be prophesying:

And when they came thither to the hill, behold, a band of prophets met him; and the Spirit of God came mightily upon him, and he prophesied among them.

Now when Saul's old friends saw him among the band of prophets, the people said to one another, What has come to Saul, the son of Kish? Is even Saul among the prophets?

And Saul sent men to take David; and when they saw the band of prophets at work, with Samuel in his place at their head, the spirit of God came on Saul's men, and they became like prophets.