Psalms 127:1

Except the Lord build the house, Himself watching over the erection of every building executed by men and prospering their labors, they labor in vain that build it, there being so many possibilities of failure if the blessing or consent of the Lord is missing; except the Lord keep the city, Himself the Watchman and Guardian prospering the precautionary measures of the citizens, the watchman waketh but in vain, no matter with what degree of faithfulness he applies himself to his appointed work.