How Necessary is TITHING in Christianity??? B

A sequel to part "A"
THERE ARE SEVERAL CHRISTISTIANS WHO PAYS THEIR TITHES REGULARLY TO CHURCHES
This , others condemn as an old testament judaistic ritual which is not necessary in Christianity

In context with the following Scriptutures ,what is your advise to these dissenting or consenting groups???

1) Gen 14:20 KJV.
"And blessed be the most high God, which had delivered the enemies into the hand. And he gave him tithes of All"

2)Numbers 18: 24 KJV .
But the tithes of the children of Isreal which they offer as heave Offering unto the LORD, I have given to the Levites to inherit: therefore I have said unto them, Among the children of Isreal, they shall have no Inheritance"

3)Malachi 3:10 KJV
Bring ye all the tithes into the storehouse, that there may be meat in my house, and prove me now herewith, said the Lord of hosts , if I will not open you the windows of heaven, and pour you out a blessing that there Shall not be room enough to receive it

4)Matthew 23:23 KJV
Woe unto you scribes and Pharisees, Hypocrites! for ye pay tithes of mints and anise and cummin,, and have omitted the weightier matters of the law, Judgement, mercy, and faith: these ye ought to have done, and NOT to leave the other UNDONE

5)Matthew 5:17 KJV
Think NOT that I have come to Destroy the law, or the prophets: I am not come to destroy , but to Fulfill

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