Cross reference
Galatians 4:11
11 I am afraid for you, that I might have wasted my labor for you.
1 Thessalonians 3:5
5 For this cause I also, when I couldn't stand it any longer, sent that I might know your faith, for fear that by any means the tempter had tempted you, and our labor would have been in vain.
Galatians 2:2
2 I went up by revelation, and I laid before them the Gospel which I preach among the Gentiles, but privately before those who were respected, for fear that I might be running, or had run, in vain.
2 John 1:8
8 Watch yourselves, that we don't lose the things which we have accomplished, but that we receive a full reward.
Philippians 2:16
16 holding up the word of life; that I may have something to boast in the day of Christ, that I didn't run in vain nor labor in vain.
Galatians 5:2-4
2 Behold, I, Paul, tell you that if you receive circumcision, Christ will profit you nothing.
3 Yes, I testify again to every man who receives circumcision, that he is a debtor to do the whole law.
4 You are alienated from Christ, you who desire to be justified by the law. You have fallen away from grace.
Galatians 4:20
20 but I could wish to be present with you now, and to change my tone, for I am perplexed about you.
2 Corinthians 12:20-21
20 For I am afraid that by any means, when I come, I might find you not the way I want to, and that I might be found by you as you don't desire; that by any means there would be strife, jealousy, outbursts of anger, factions, slander, whisperings, proud thoughts, riots;
21 that again when I come my God would humble me before you, and I would mourn for many of those who have sinned before now, and not repented of the uncleanness and sexual immorality and lustfulness which they committed.
2 Corinthians 11:2-3
2 For I am jealous over you with a godly jealousy. For I married you to one husband, that I might present you as a pure virgin to Christ.
3 But I am afraid that somehow, as the serpent deceived Eve in his craftiness, so your minds might be corrupted from the simplicity that is in Christ.
1 Corinthians 15:58
58 Therefore, my beloved brothers, be steadfast, immovable, always abounding in the Lord's work, because you know that your labor is not in vain in the Lord.
Acts 16:6
6 When they had gone through the region of Phrygia and Galatia, they were forbidden by the Holy Spirit to speak the word in Asia.
Isaiah 49:4
4 But I said, I have labored in vain, I have spent my strength for nothing and vanity; yet surely the justice [due] to me is with Yahweh, and my recompense with my God.