1 Thessalonians 2:1
For [you] yourselves know, brothers, our reception with you, that it was not in vain,
Psalm 127:1
Unless Yahweh builds a house, its builders labor at it in vain. Unless Yahweh guards a city, a guard watches in vain.
Isaiah 49:4
But I myself said, "I have labored in vain; I have used up my strength for nothing and vanity! Nevertheless, my justice [is] with Yahweh, and my reward [is] with my God."
Isaiah 65:23
They shall not labor for nothing, and they shall not give birth to horror, for they {shall be offspring blessed by} Yahweh, and their descendants with them.
Habakkuk 2:13
Look! [Is it] not from Yahweh of hosts that people labor for mere fire, and nations exhaust themselves for mere vanity?
1 Corinthians 15:2
by which you are also being saved, if you hold fast to the message I proclaimed to you, unless you believed to no purpose.
1 Corinthians 15:10
But by the grace of God I am what I am, and his grace to me has not been in vain, but I labored even more than all of them, and not I, but the grace of God with me.
1 Corinthians 15:58
So then, my dear brothers, be steadfast, immovable, always abounding in the work of the Lord, [because you] know that your labor is not [in] vain in the Lord.
2 Corinthians 6:1
Now [because we] are fellow workers, we also urge you not to receive the grace of God in vain.
Galatians 2:2
Now I went up [there] because of a revelation and laid out to them the gospel that I preach among the Gentiles, but in private to the influential people, lest somehow I was running, or had run, in vain.
Galatians 4:11
I am afraid [for] you, lest perhaps I have labored for you in vain!
Philippians 2:16
holding fast to the word of life, for a source of pride to me in the day of Christ, that I did not run in vain or labor in vain.
1 Thessalonians 1:3-10
[because we] remember your work of faith and labor of love and steadfastness of hope in our Lord Jesus Christ in the presence of our God and Father,
1 Thessalonians 2:13
And because of this we also give thanks to God constantly, that [when you] received God's word {that you heard} from us, you accepted [it] not [as the] word of men, but as [it] truly is, [the] word of God, which also is at work in you who believe.
1 Thessalonians 3:5
Because of this, I also, [when I] could endure [it] no longer, sent in order to know your faith, lest somehow the tempter tempted you and our labor should be in vain.
2 Thessalonians 1:10
whenever he should come to be glorified on that day by his saints and to be marveled at by all who believe, because our testimony was believed among you,
2 Thessalonians 3:1
Finally, brothers, pray for us, that the word of the Lord may progress and be honored, just as also [it was] with you,
Job 39:16
It deals cruelly with its young ones, as [if] [they were] not its [own], as [if] without fear [that] its labor [were] in vain,
Psalm 73:13
Surely in vain I have kept my heart pure, and washed my hands in innocence.