Unless it is the LORD who builds the house, the builders' work is pointless. Unless it is the LORD who protects the city, the guard on duty is pointless.
References for Psalms 127:1
It is pointless that you get up early and stay up late, eating the bread of hard labor because God gives sleep to those he loves.
No doubt about it: children are a gift from the LORD; the fruit of the womb is a divine reward.
The children born when one is young are like arrows in the hand of a warrior.
The person who fills a quiver full with them is truly happy! They won't be ashamed when arguing with their enemies in the gate.