1 Thessalonians 2:1
For ye yourselves know, brethren, that our coming among you hath not been in vain;
1 Corinthians 15:2
by which also ye are saved, if ye hold fast the same word which I preached to you, unless ye believed in vain.
1 Corinthians 15:10
But by the grace of God I am what I am; and his grace which was bestowed upon me was not in vain, but I labored more abundantly than they all; yet not I, but the grace of God which was with me.
1 Corinthians 15:58
Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, since ye know that your labor is not in vain in the Lord.
2 Corinthians 6:1
As fellowworkers, then, with him, we also exhort you that ye receive not the grace of God in vain;
Galatians 2:2
And I went up by revelation, and communicated to them that gospel which I preach among the gentiles; but privately to those who were of reputation, lest by any means I should run, or had run, in vain.
Galatians 4:11
I fear for you, lest I may have bestowed upon you labor in vain.
Philippians 2:16
holding forth the word of life, that I may have whereof to boast against the day of Christ, that I did not run in vain, or labor in vain.
1 Thessalonians 1:3-10
remembering without ceasing your work of faith, and labor of love, and perseverance in the hope in our Lord Jesus Christ, before God our Father;
1 Thessalonians 2:13
And for this cause we also thank God without ceasing, that, when ye received the word of God which ye heard from us, ye received it not as the word of men, but, as it is in truth, the word of God, which also is powerfully working in you that believe.
1 Thessalonians 3:5
For this cause, when I too could no longer forbear, I sent in order to know your faith, lest by some means the tempter might have tempted you, and our labor should prove in vain.
2 Thessalonians 1:10
when he shall come in that day to be glorified in his saints, and to be admired in all who believed; for our testimony to you was believed.
2 Thessalonians 3:1
Finally, brethren, pray for us, that the word of the Lord may run and be glorified, as with you,