Treasury of Scripture Knowledge
And I applied my heart to seek and to search out by wisdom concerning all that is done under heaven: it is a sore travail that God hath given to the sons of men to be exercised therewith.
For to the man that pleaseth him God giveth 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 pleaseth God. This also is vanity and a striving after wind.
in the sweat of thy face shalt thou eat bread, till thou return unto 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 labor and travail: working night and day, that we might not burden any of you, we preached unto you the gospel of God.
2 Thessalonians 3:8
neither did we eat bread for nought at any man's hand, but in labor and travail, working night and day, that we might not burden any of you: