Psalm 127:2 in the King James Version
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.
Context
1 Unless the LORD builds the house, they who build it labor in vain. Unless the LORD watches over the city, the watchman guards it in vain.
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 the LORD. The fruit of the womb is his reward.