Psalms 127:2-6

It is vain for you to rise up early, to sit up late, to eat the bread of sorrows: for so he giveth his beloved sleep.

Lo, children are an heritage of the LORD: and the fruit of the womb is his reward.

As arrows are in the hand of a mighty man; so are children of the youth.

Happy is the man that hath his quiver full of them: they shall not be ashamed, but they shall speak with the enemies in the gate.