Genesis 3:19
By the sweat of your face you shall eat bread, till you return to the ground, for out of it you were taken; for you are dust, and to dust you shall return.
Psalm 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.
Colossians 3:23
Whatever you do, work heartily, as for the Lord and not for men…