1 Thessalonians 2:1
For you yourselves, brethren, know that our visit to you did not fail of its purpose.
1 Corinthians 15:2
through which also you are obtaining salvation, if you bear in mind the words in which I proclaimed it--unless indeed your faith has been unreal from the very first.
1 Corinthians 15:10
But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.
1 Corinthians 15:58
Therefore, my dear brethren, be firm, unmovable, busily occupied at all times in the Lord's work, knowing that your toil is not fruitless in the Lord.
2 Corinthians 6:1
And you also we, as God's fellow workers, entreat not to be found to have received His grace to no purpose.
Galatians 2:2
I went up in obedience to a revelation of God's will; and I explained to them the Good News which I proclaim among the Gentiles. To the leaders of the Church this explanation was made in private, lest by any means I should be running, or should already have run, in vain.
Galatians 4:11
I am alarmed about you, and am afraid that I have perhaps bestowed labour upon you to no purpose.
Philippians 2:16
holding out to them a Message of Life. It will then be my glory on the day of Christ that I did not run my race in vain nor toil in vain.
1 Thessalonians 1:3-10
For we never fail to remember your works of faith and labours of love and your persistent and unwavering hope in our Lord Jesus Christ in the presence of our God and Father;
1 Thessalonians 2:13
And for this further reason we render unceasing thanks to God, that when you received God's Message from our lips, it was as no mere message from men that you embraced it, but as--what it really is--God's Message, which also does its work in the hearts of you who believe.
1 Thessalonians 3:5
For this reason I also, when I could no longer endure the uncertainty, sent to know the condition of your faith, lest perchance the Tempter might have tempted you and our labour have been lost.
2 Thessalonians 1:10
when He comes on that day to be glorified in His people and to be wondered at among all who have believed, including you--because you believed the testimony which we brought for your acceptance.
2 Thessalonians 3:1
Finally, brethren, pray for us, asking that the Lord's Message may be spread rapidly and its glory be displayed, as it was displayed among you;