'Fourteen' in the Bible

Solomon held the festival at that time and all of Israel with him, a great assembly from Lebo Hamath up to the wadi of Egypt before Yahweh our God, for seven days [and] seven days, [a total of] fourteen days.

Solomon gathered chariots and horses; he had fourteen hundred chariots and twelve thousand horses. He stationed them in the cities of the chariots and with the king in Jerusalem.