127:1 Unless the Lord builds the house,
those who build it labor in vain.
Unless the Lord watches over the city,
the watchman stays awake in vain.
2 It is in vain that you rise up early
and go late to rest,
eating the bread of anxious toil;
for he gives to his beloved sleep.
3 Behold, children are a heritage from the Lord,
the fruit of the womb a reward.
4 Like arrows in the hand of a warrior
are the children  of one's youth.
5 Blessed is the man
who fills his quiver with them!
He shall not be put to shame
when he speaks with his enemies in the gate.  (ESV)