Psalms 127:4 WEB

²  It is vain for you to rise up early, To stay up late, Eating the bread of toil; For he gives sleep to his loved ones.

³  Behold, children are a heritage of Yahweh. The fruit of the womb is his reward.

⁴  As arrows in the hand of a mighty man, So are the children of youth.

⁵  Happy is the man who has his quiver full of them. They won't be disappointed when they speak with their enemies in the gate.