Verses with the word prophesying in the Old Testament (3 verses):

1 Samuel 10:13
And when he had made an end of prophesying, he came to the high place.

1 Samuel 19:20
And Saul sent messengers to take David: and when they saw the company of the prophets prophesying, and Samuel standing as appointed over them, the Spirit of God was upon the messengers of Saul, and they also prophesied.

Ezra 6:14
And the elders of the Jews builded, and they prospered through the prophesying of Haggai the prophet and Zechariah the son of Iddo. And they builded, and finished it, according to the commandment of the God of Israel, and according to the commandment of Cyrus, and Darius, and Artaxerxes king of Persia.