'Thirty ninth' in the Bible

Shallum the son of Jabesh began to reign the thirty ninth year of Uzziah king of Judah, and he reigned a month in Samaria.

The thirty ninth year of Uzziah king of Judah, began Menahem the son of Gadi to reign upon Israel, and continued ten years in Samaria.

And the thirty ninth year of his reign Asa fell sick of his feet, and that his disease exceeded. And thereto in his sickness he asked no counsel of the LORD, but of Physicians.