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."

1 Thessalonians 3:5-6

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.

Treasury of Scripture Knowledge

Summary

And carry these ten cheeses unto the captain of their thousand, and look how thy brethren fare, and take their pledge.

Bible References

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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."
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.