Acts 20:31

Wherefore watch, remembering that for three years, night and day, I ceased not to admonish every one of you with tears.

1 Thessalonians 5:14

And we exhort you, brothers, admonish the disorderly, comfort the dispirited, assist the sick, be of long suffering towards all men.

Treasury of Scripture Knowledge

Summary

And what cause soever shall come to you of your brethren that dwell in their cities, between blood and blood, between law and commandment, statutes and judgments, ye shall even warn them that they trespass not against the LORD, and so wrath come upon you, and upon your brethren: this do, and ye shall not trespass.

Bible References

Warn them

Acts 20:31
Wherefore watch, remembering that for three years, night and day, I ceased not to admonish every one of you with tears.
1 Thessalonians 5:14
And we exhort you, brothers, admonish the disorderly, comfort the dispirited, assist the sick, be of long suffering towards all men.