. . . Except the LORD build the house, they labour in vain that build it: except the LORD keep the city, the watchman
waketh but 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 giveth his beloved sleep.
1 Cor. 15:58
58 ¶ Therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the Lord,
forasmuch as ye know that your labour is not in vain in the Lord.