"Behold, I send My messenger,
And he will prepare the way before Me.
And the LORD, whom you seek,
Will suddenly come to His temple,
Even the Messenger of the covenant,
In whom you delight.
Behold, He is coming,"
Says the LORD of hosts.

"But who can endure the day of His coming?
And who can stand when He appears?
For He is like a refiner's fire
And like launderers' soap.
He will sit as a refiner and a purifier of silver;
He will purify the sons of Levi,
And purge them as gold and silver,
That they may offer to the LORD
An offering in righteousness.

Then the offering of Judah and Jerusalem
Will be pleasant to the LORD,
As in the days of old,
As in former years."

... "Your words have been harsh against Me,"
Says the LORD,
"Yet you say,
'What have we spoken against You?'
You have said,
'It is useless to serve God;
What profit is it that we have kept His ordinance,
And that we have walked as mourners
Before the LORD of hosts?
So now we call the proud blessed,
For those who do wickedness are raise up;
They even tempt God and go free.'"
Malachi 3:1-4, 13-15

"‘And it shall come to pass in all the land,’ says the LORD, ‘that two thirds in it shall be cut off and die, but one third shall be left in it: I will bring the one-third through fire, will refine them as silver is refined, and test them as gold is tested. They will call on My name, and I will answer them. I will say, "This is My people," and each one will say "The LORD is my God.’"
Zechariah 13:8-9

Therefore we also, since we are surrounded by so great a cloud of witnesses, let us lay aside every weight, and the sin which so easily ensnares us, and let us run with endurance the race that is set before us, looking unto Jesus, the author and finisher of our faith, who for the joy that was set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.

For consider Him who endured such hostility from sinners against Himself, lest you become weary and discouraged in your souls. You have not yet resisted to bloodshed, striving against sin. And You have forgotten the exhortation which speaks to you as to sons:

"My son, do not despise the chastening of the LORD,
Nor be discouraged when you are rebuked by Him;
For whom the LORD loves He chastens,
And scourges every son whom He receives."

If you endure chastening, God deals with you as with sons for what son is there whom a father does not chasten? But if you are without chastening, of which all have become partakers, then you are illegitimate and not sons. Furthermore, we have had human fathers who corrected us, and we paid them respect. Shall we not much more readily be in subjection tot the Father of spirits and live?

For indeed for a few days they chastened us as seemed best to them, but He for our profit, that we may be partakers of His holiness. Now no chastening seems to be joyful for the present, but painful; nevertheless, afterward it yields the peaceable fruit of righteousness to those who have been trained by it.

Therefore strengthen the hands which hang down, and the feeble knees, and make straight paths for your feet, so that what is lame may not be dislocated, but rather be healed. Pursue peace with all people, and holiness, without which no one will see the Lord: looking carefully lest anyone fall short of the grace of God; lest any root of bitterness springing up cause trouble, and by this many become defiles; lest there be any fornicator or profane person like Esau, who for one morsel of food sold his birthright. For you know that afterward, when he wanted to inherit the blessing, he was rejected, for he found no place for repentance, though he sought it diligently with tears.
Hebrews 12:1-17

You have dealt well with Your servant,
O LORD, according to Your word.
Teach me good judgment and knowledge,
For I believe Your commandments.
Before I was afflicted I went astray,
But now I keep Your word.
You are good, and do good;
Teach me Your statutes.
The proud have forged a lie against me,
But I will keep Your precepts with my whole heart.
Their heart is as fat as grease,
But I delight in Your law.
It is good for me that I have been afflicted,
That I may learn Your statutes.
The law of Your mouth is better to me
Than thousands of coins of gold and silver.
Psalm 119:64-72

"Then those who feared the LORD spoke to one another,
And the LORD listened and heard them;
So a book of remembrance was written before Him
For those who fear the LORD
And who meditate on His name.

'They shall be Mine,' says the LORD of hosts,
'On the day that I make them My jewels.
And I will spare them
As a man spares his own son who serves him."
Then you shall again discern
Between the righteous and the wicked,
Between the one who serves God
And one who does not serve Him.
Malachi 3:16-18