Verses with the word hostages in the Old Testament (2 verses):

2 Kings 14:14
And he took all the gold and silver, and all the vessels that were found in the house of the LORD, and in the treasures of the king's house, and hostages, and returned to Samaria.

2 Chronicles 25:24
And he took all the gold and the silver, and all the vessels that were found in the house of God with Obededom, and the treasures of the king's house, the hostages also, and returned to Samaria.