Where is this written?

11 

Unless the Lord builds the house,
They labor in vain who build it;
Unless the Lord guards the city,
The watchman stays awake in vain.
² It is vain for you to rise up early,
To sit up late,
To eat the bread of sorrows;
For so He gives His beloved sleep.
           Behold, children are a heritage from the Lord,

          The fruit of the womb is a reward.
          Like arrows in the hand of a warrior,
          So are the children of one’s youth.
          Happy is the man who has his quiver full of them;
         They shall not be ashamed,
         But shall speak with their enemies in the gate.