1 Thessalonians 3:5

For this reason, when I could no longer contain my self, I sent to know your faith, lest by any means the tempter had tempted you, and our labor should be in vain.

Matthew 4:3

And the tempter came to him and said: If you are the Son of God, command that these stones become bread.

Philippians 2:16

holding forth the word of life, that I may rejoice in the day of Christ, that I did not run in vain, nor labor in vain.

1 Corinthians 7:5

Debar not one another, unless by agreement for a time, that you may have leisure for prayer; and come together again, lest Satan tempt you through your incontinence.

Galatians 2:2

And I went up because of a revelation, and communicated to them the gospel that I preach among the Gentiles, but privately to those who are of reputation, lest, by any means, I should run or had run in vain.

1 Thessalonians 3:1-2

Wherefore, being no longer able to contain ourselves, we thought it good to be left at Athens alone;

Acts 15:36

And, after some days, Paul said to Barnabas, let us return, and visit our brethren in every city in which we have preached the word of the Lord, and see how they do.

2 Corinthians 2:11

lest an advantage should be taken of us by Satan; for we are not ignorant of his devices.

2 Corinthians 7:5-7

For when we came into Macedonia, our flesh had no rest; but we were oppressed on every side: without were battles, within were fears.

2 Corinthians 11:2-3

for I am jealous over you with a godly jealousy: for I have betrothed you to one husband, that I may present you a chaste virgin to Christ.

2 Corinthians 11:13-15

For such men are false apostles, deceitful workers, trans forming themselves into the apostles of Christ;

Galatians 1:6-9

I am astonished that you are so soon turning away from him that called you into the grace of Christ, to another gospel:

Galatians 4:11

fear for you, lest I have bestowed labor upon you in vain.

Ephesians 4:14

that we might no longer be children, tossed and carried about by every wind of teaching, through the artifice of men, through craftiness used by them for the deliberate planning of deceit;

1 Thessalonians 2:1

For you yourselves know, brethren, our entrance among you, that it was not in vain.

1 Thessalonians 3:6

But now, since Timothy has come to us from you, and has told us the good news of your faith and love, and that you have a good remembrance of us at all times, greatly desiring to see us, as indeed we desire to see you,

James 1:13-14

Let no one say, when he is tempted, My temptation is from God; for God can not be tempted by evils, and he himself tempts no man.

Treasury of Scripture Knowledge

Summary

For this cause, when I could no longer forbear, I sent to know your faith, lest by some means the tempter have tempted you, and our labour be in vain.

Bible References

I sent

1 Thessalonians 3:2
and we sent Timothy our brother and minister of God in the gospel of the Christ, in order that he might strengthen and comfort you with respect to your faith,
Acts 15:36
And, after some days, Paul said to Barnabas, let us return, and visit our brethren in every city in which we have preached the word of the Lord, and see how they do.
2 Corinthians 7:5
For when we came into Macedonia, our flesh had no rest; but we were oppressed on every side: without were battles, within were fears.

And our

1 Thessalonians 2:1
For you yourselves know, brethren, our entrance among you, that it was not in vain.
Galatians 2:2
And I went up because of a revelation, and communicated to them the gospel that I preach among the Gentiles, but privately to those who are of reputation, lest, by any means, I should run or had run in vain.
Galatians 4:11
fear for you, lest I have bestowed labor upon you in vain.
Philippians 2:16
holding forth the word of life, that I may rejoice in the day of Christ, that I did not run in vain, nor labor in vain.