Treasury of Scripture Knowledge
And I applied my heart to seek and search out by wisdom concerning all that is done under the heavens: this grievous occupation hath God given to the children of men to weary themselves therewith.
For he giveth to a man that is good in his sight wisdom, and knowledge, and joy; but to the sinner he giveth travail to gather and to heap up, that he may give to him that is good in God's sight. This also is vanity and pursuit of the wind.
In the sweat of thy face shalt thou eat bread, until thou return to the ground: for out of it wast thou taken. For dust thou art; and unto dust shalt thou return.
1 Thessalonians 2:9
For ye remember, brethren, our labour and toil: working night and day, not to be chargeable to any one of you, we have preached to you the glad tidings of God.
2 Thessalonians 3:8
nor have we eaten bread from any one without cost; but in toil and hardship working night and day not to be chargeable to any one of you: