Proverbs 9:8 Reprove not a scorner, lest he hate thee: rebuke a wise man, and he will love thee.

Proverbs 10:17 He is in the way of life that keepeth instruction: but he that refuseth reproof erreth.

Proverbs 12:1 Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.

Proverbs 13:18 Poverty and shame shall be to him that refuseth instruction: but he that regardeth reproof shall be honoured.

Proverbs 15:5 A fool despiseth his father's instruction: but he that regardeth reproof is prudent.
Proverbs 15:10 Correction is grievous unto him that forsaketh the way: and he that hateth reproof shall die.
Proverbs 15:31 The ear that heareth the reproof of life abideth among the wise.
Proverbs 15:32 He that refuseth instruction despiseth his own soul: but he that heareth reproof getteth understanding.

Proverbs 17:10 A reproof entereth more into a wise man than an hundred stripes into a fool.

Proverbs 19:25 Smite a scorner, and the simple will beware: and reprove one that hath understanding, and he will understand knowledge.

Proverbs 29:15 The rod and reproof give wisdom: but a child left to himself bringeth his mother to shame.

Ecclesiastes 7:5 It is better to hear the rebuke of the wise, than for a man to hear the song of fools.

Commentary:
It is better to hear the rebuke of the wise ---To listen to it diligently, receive it cordially, and act according to it; though it may be disagreeable to the flesh, and give present pain, yet the effect and issue will be good, and show that man to be wise that hears it, as well as he that gives it;. - John Gill's Exposition of the Entire Bible

Amos 5:10 They hate him that rebuketh in the gate, and they abhor him that speaketh uprightly.

Commentary:
They hate him that rebuketh in the gate ----Openly and publicly in the courts of judicature: wicked judges hated the prophets of the Lord, such as Amos, who faithfully reproved them for the perversion of justice, even when they were upon the bench. - John Gill's Exposition of the Entire Bible

Now to Chapter 4 of Galatians. The design of this chapter is, to show the effect of being under the Law, and the inconsistency of that kind of bondage or servitude with the freedom which is vouchsafed to the true children of God by the gospel. It is, in accordance with the whole drift of the Epistle, to recall the Galatians to just views of the gospel; and to convince them of their error in returning to the practice of the Mosaic rites and customs.

He says in Galatians 4:16: Am I therefore become your enemy, because I tell you the truth?

Commentary:
Am I therefore become your enemy ---- Is my telling you the truth in regard to the tendency of the doctrines which you have embraced, and the character of those who have led you astray, and your own error, a proof that I have ceased to be your friend? How apt are we to feel that the man who tells us of our faults is our enemy! How apt are we to treat him coldly, and to “cut his acquaintance,” and to regard him with dislike! The reason is, he gives us pain; and we cannot have pain given to us, even by the stone against which we stumble, or by any of the brute creation, without momentary indignation, or regarding them for a time as our enemies. Besides, we do not like to have another person acquainted with our faults and our follies; and we naturally avoid the society of those who are thus acquainted with us. Such is human nature; and it requires no little grace for us to overcome this. and to regard the man who tells us of our faults, or the faults of our families, as our friend.

We love to be flattered, and to have our friends flattered; and we shrink with pain from any exposure, or any necessity for repentance. Hence, we become alienated from him who is faithful in reproving us for our faults. Hence, people become offended with their ministers when they reprove them for their sins. Hence, they become offended at the truth. Hence, they resist the influences of the Holy Spirit, whose office it is to bring the truth to the heart, and to reprove men for their sins. There is nothing more difficult than to regard with steady and unwavering affection the man who faithfully tells us the truth at all times, when that truth is painful. Yet he is our best friend. “Faithful are the wounds of a friend, but the kisses of an enemy are deceitful,” Proverbs 27:6. If I am in danger of falling down a precipice, he shows to me the purest friendship who tells me of it; if I am in danger of breathing the air of the pestilence, and it can be avoided, he shows to me pure kindness who tells me of it. So still more, if I am indulging in a course of conduct that may ruin me, or cherishing error that may endanger my salvation, he shows me the purest friendship who is most faithful in warning me, and apprising me of what must be the termination of my course. ~Barnes

1 Thessalonians 5:12-15 And we beseech you, brethren, to know them which labour among you, and are over you in the Lord, and admonish you; And to esteem them very highly in love for their work's sake. And be at peace among yourselves. Now we exhort you, brethren, warn them that are unruly, comfort the feebleminded, support the weak, be patient toward all men. See that none render evil for evil unto any man; but ever follow that which is good, both among yourselves, and to all men.

Now notice what it says here in verse, "We exhort you, BRETHREN, warn them that are unruly.

Commentary:
Warn them - The same word which in 1 Thessalonians 5:12 is rendered “admonish.” It is the duty of every church member, as well as of the ministers of the gospel, affectionately to admonish those whom they know to be living contrary to the requirements of the gospel. One reason why there is so little piety in the church, and why so many professors of religion go astray, is, that the great mass of church members feel no responsibility on this subject. They suppose that it is the duty only of the officers of the church to admonish an erring brother, and hence many become careless and cold and worldly, and no one utters a kind word to them to recall them to a holy walk with God.