1 Thessalonians 3:5

For this reason, I also, no longer enduring it, sent, that I might know your faith, lest by some means the tempter tempted you, and our labor should be in vain.

Matthew 4:3

And the Tempter, having come near, said to Him, "If Thou art God's Son, speak, that these stones may become loaves of bread."

Philippians 2:16

holding forth the word of life, for an occasion of glorying to me at the day of Christ, that I ran not in vain, neither labored in vain.

1 Corinthians 7:5

Defraud not one the other, except by consent for a Season, that ye may have leisure for prayer, and may be together again, that Satan tempt you not because of your incontinency.

Galatians 2:2

And I went up according to revelation, and laid before them the Gospel which I preach among the Gentiles; but privately to those of repute, lest by any means I should run, or had run, in vain.

1 Thessalonians 3:1-2

Wherefore, when no longer able to endure it, we were well pleased to be left behind at Athens alone,

1 Thessalonians 3:1

Wherefore, when no longer able to endure it, we were well pleased to be left behind at Athens alone,

Acts 15:36

And, after some days, Paul said to Barnabas, "Turning about, let us visit the brethren in every city, in which we proclaimed the word of the Lord, and see how they are doing."

2 Corinthians 2:11

that we might not be over-reached by Satan; for we are not ignorant of his devices.

2 Corinthians 7:5-7

For even when we came into Macedonia, our flesh had no relief; but we were in tribulation on every side; without were fightings, within were fears.

2 Corinthians 11:2-3

For I am jealous over you with a godly jealousy; for I espoused you to one husband, that I may present you as a pure virgin to Christ;

2 Corinthians 11:13-15

For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ;

Galatians 1:6-9

I marvel that ye are so quickly removing from Him Who called you in the grace of Christ, to a different Gospel,

Galatians 4:11

I am afraid of you, lest by any means I have toiled for you in vain.

Ephesians 4:14

that we may no longer be babes, billow-tossed, and carried about with every wind of teaching, in the sleight of men, in the craftiness suited to the artifice of error;

1 Thessalonians 2:1

For ye yourselves, brethren, know our entrance to you, that it has not become vain;

1 Thessalonians 3:6

But, Timothy having just now come to us from you, and having brought us good tidings of your faith and love, and that ye have good remembrance of us at all times, longing to see us, as we also to see you??7 for this reason, brethren, we were comforted over you, in all our tribulation and distress, through your faith;

James 1:13-14

Let no one, when tempted, say, "I am tempted from God"; for God cannot be tempted with evils, and He Himself tempteth no one.

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 sent Timothy, our brother and minister of God in the Gospel of Christ, to establish you, and to exhort you concerning your faith;
Acts 15:36
And, after some days, Paul said to Barnabas, "Turning about, let us visit the brethren in every city, in which we proclaimed the word of the Lord, and see how they are doing."
2 Corinthians 7:5
For even when we came into Macedonia, our flesh had no relief; but we were in tribulation on every side; without were fightings, within were fears.

And our

1 Thessalonians 2:1
For ye yourselves, brethren, know our entrance to you, that it has not become vain;
Galatians 2:2
And I went up according to revelation, and laid before them the Gospel which I preach among the Gentiles; but privately to those of repute, lest by any means I should run, or had run, in vain.
Galatians 4:11
I am afraid of you, lest by any means I have toiled for you in vain.
Philippians 2:16
holding forth the word of life, for an occasion of glorying to me at the day of Christ, that I ran not in vain, neither labored in vain.