'Forty year' in the Bible

And it came to pass, when he made mention of the ark of God, that [Eli] fell from off his seat backward by the side of the gate. And his neck broke, and he died, for he was an old man, and heavy. And he had judged Israel forty year

But when a forty year time span was fulfilled by him, it came into his heart to go help his brothers, the sons of Israel.

And for about a forty-year time he was patient with them in the wilderness.