'Forty one' in the Bible

And, Rehoboam, son of Solomon, reigned in Judah, - forty-one years old, was Rehoboam when he began to reign, and seventeen years, reigned he in Jerusalem, the city which Yahweh had chosen to put his Name there, out of all the tribes of Israel, and, his mother's name, was Naamah, the Ammonitess.

and, forty-one years, reigned he in Jerusalem, - and, the name of his mother, was Maachah, daughter of Abishalom.