'Forty one' in the Bible

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

and ruled in Jerusalem forty one years. And his mother's name was Maacah the daughter of Abishalom.