[Jesus] said to Simon, "Put out into the deep and let down your nets for a catch." And Simon answered, "Master, we toiled all night and took nothing! But at your word I will let down the nets."
- St. Luke 5:4,5
Or, as King David puts it in the Psalms,
Except the Lord build the house, their labour is but lost that build it.
- Psalm 127:1