Cross reference
Ecclesiastes 3:10
10 I have seen the travail that God hath given to the sons of man to be humbled by it.
Genesis 3:19
19 by the sweat of thy face thou dost eat bread till thy return unto the ground, for out of it hast thou been taken, for dust thou `art', and unto dust thou turnest back.'
Ecclesiastes 1:13-14
13 And I have given my heart to seek and to search out by wisdom concerning all that hath been done under the heavens. It `is' a sad travail God hath given to the sons of man to be humbled by it.
14 I have seen all the works that have been done under the sun, and lo, the whole `is' vanity and vexation of spirit!
Ecclesiastes 2:26
26 For to a man who `is' good before Him, He hath given wisdom, and knowledge, and joy; and to a sinner He hath given travail, to gather and to heap up, to give to the good before God. Even this `is' vanity and vexation of spirit.
1 Thessalonians 2:9
9 for ye remember, brethren, our labour and travail, for, night and day working not to be a burden upon any of you, we did preach to you the good news of God;
2 Thessalonians 3:8
8 nor for nought did we eat bread of any one, but in labour and in travail, night and day working, not to be chargeable to any of you;