Scriptural support for tithing taken from this website:
http://www.kingjamesbibleonline.org/Bible-Verses-About-Tithing-and-Offering/
Leviticus 27:30*- And all the tithe of the land, [whether] of the seed of the land, [or] of the fruit of the tree, [is] the LORD'S: [it is] holy unto the LORD.
Matthew 23:23*- Woe unto you, scribes and Pharisees, hypocrites! for ye pay tithe of mint and anise and cummin, and have omitted the weightier [matters] of the law, judgment, mercy, and faith: these ought ye to have done, and not to leave the other undone.
Malachi 3:10*- Bring ye all the tithes into the storehouse, that there may be meat in mine house, and prove me now herewith, saith 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].
2 Corinthians 9:7*- Every man according as he purposeth in his heart, [so let him give]; not grudgingly, or of necessity: for God loveth a cheerful giver.
Psalms 24:1*- (A Psalm of David.) The earth [is] the LORD'S, and the fulness thereof; the world, and they that dwell therein.
Numbers 18:21*- And, behold, I have given the children of Levi all the tenth in Israel for an inheritance, for their service which they serve, [even] the service of the tabernacle of the congregation.
Malachi 3:8*- Will a man rob God? Yet ye have robbed me. But ye say, Wherein have we robbed thee? In tithes and offerings.
Romans 12:1*- I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, [which is] your reasonable service.
Acts 20:35*- I have shewed you all things, how that so labouring ye ought to support the weak, and to remember the words of the Lord Jesus, how he said, It is more blessed to give than to receive.
1 Corinthians 13:3*- And though I bestow all my goods to feed [the poor], and though I give my body to be burned, and have not charity, it profiteth me nothing.
John 3:16*- For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Luke 6:38*- Give, and it shall be given unto you; good measure, pressed down, and shaken together, and running over, shall men give into your bosom. For with the same measure that ye mete withal it shall be measured to you again.
1 Corinthians 9:7*- Who goeth a warfare any time at his own charges? who planteth a vineyard, and eateth not of the fruit thereof? or who feedeth a flock, and eateth not of the milk of the flock?
Luke 18:12*- I fast twice in the week, I give tithes of all that I possess.
Amos 4:4*- Come to Bethel, and transgress; at Gilgal multiply transgression; and bring your sacrifices every morning, [and] your tithes after three years:
Proverbs 3:9*- Honour the LORD with thy substance, and with the firstfruits of all thine increase:
Job 41:11*- Who hath prevented me, that I should repay [him? whatsoever is] under the whole heaven is mine.
Nehemiah 13:12*- Then brought all Judah the tithe of the corn and the new wine and the oil unto the treasuries.
Nehemiah 12:44*- And at that time were some appointed over the chambers for the treasures, for the offerings, for the firstfruits, and for the tithes, to gather into them out of the fields of the cities the portions of the law for the priests and Levites: for Judah rejoiced for the priests and for the Levites that waited.
2 Chronicles 31:5*- And as soon as the commandment came abroad, the children of Israel brought in abundance the firstfruits of corn, wine, and oil, and honey, and of all the increase of the field; and the tithe of all [things] brought they in abundantly.
Deuteronomy 14:23*- And thou shalt eat before the LORD thy God, in the place which he shall choose to place his name there, the tithe of thy corn, of thy wine, and of thine oil, and the firstlings of thy herds and of thy flocks; that thou mayest learn to fear the LORD thy God always.
Deuteronomy 14:22*- Thou shalt truly tithe all the increase of thy seed, that the field bringeth forth year by year.