Galatians 4:11
I am in fear of you, lest I have bestowed on you labour in vain.
1 Thessalonians 3:5
For this cause, when I could no longer forbear, I sent that I might have knowledge of your faith, lest haply the tempter had tempted you, and that our labour had been bestowed in vain.
Galatians 2:2
Yea, and I went up by revelation, and commended with them of the gospel, which I preach among the gentiles - but between ourselves with them which were counted chief, lest it should have been thought that I should run, or had run in vain.
Isaiah 49:4
And I said, "I labour in vain and spend my strength for nought, and unprofitably. Howbeit, my cause I commit to the LORD and my travail unto my God."
Acts 16:6
When they had gone throughout Phrygia and the region of Galatia, and were forbidden of the holy ghost to preach the word in Asia,
1 Corinthians 15:58
Therefore, my dear brethren, be ye steadfast and unmovable, always rich in the works of the Lord, forasmuch as ye know how that your labour is not in vain in the Lord.
2 Corinthians 11:2-3
For I am jealous over you with godly jealousy. For I coupled you to one man, to make you a chaste virgin to Christ:
2 Corinthians 12:20-21
For I fear, lest it come to pass, that when I come I shall not find you such as I would: and I shall be found unto you such as I would not. I fear lest there be found among you debate, envying, wrath, strife, backbitings, whisperings, swellings, and discord.
Galatians 4:20
I would I were with you now, and could change my voice, for I stand in a doubt of you.
Galatians 5:2-4
Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing at all.
Philippians 2:16
holding fast the word of life, unto my rejoicing in the day of Christ, that I have not run in vain, neither have laboured in vain.
2 John 1:8
Look on yourselves, that we lose not that we have wrought: but that we may have a full reward.