Genesis 14:19-21 (King James Version)

19  And he blessed him, and said, Blessed be Abram of the most high God, possessor of heaven and earth:

20  And blessed be the most high God, which hath delivered thine enemies into thy hand. And he gave him tithes of all.

21  And the king of Sodom said unto Abram, Give me the persons, and take the goods to thyself.

Leviticus 27:29-33 (King James Version)

29  None devoted, which shall be devoted of men, shall be redeemed; but shall surely be put to death.

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.

31  And if a man will at all redeem ought of his tithes, he shall add thereto the fifth part thereof.

32  And concerning the tithe of the herd, or of the flock, even of whatsoever passeth under the rod, the tenth shall be holy unto the LORD.

33  He shall not search whether it be good or bad, neither shall he change it: and if he change it at all, then both it and the change thereof shall be holy; it shall not be redeemed.

Numbers 18:27-29 (King James Version)

23  But the Levites shall do the service of the tabernacle of the congregation, and they shall bear their iniquity: it shall be a statute for ever throughout your generations, that among the children of Israel they have no inheritance.

24  But the tithes of the children of Israel, which they offer as an heave offering unto the LORD, I have given to the Levites to inherit: therefore I have said unto them, Among the children of Israel they shall have no inheritance.

25  And the LORD spake unto Moses, saying,

26  Thus speak unto the Levites, and say unto them, When ye take of the children of Israel the tithes which I have given you from them for your inheritance, then ye shall offer up an heave offering of it for the LORD, even a tenth part of the tithe.

27  And this your heave offering shall be reckoned unto you, as though it were the corn of the threshingfloor, and as the fulness of the winepress.

28  Thus ye also shall offer an heave offering unto the LORD of all your tithes, which ye receive of the children of Israel; and ye shall give thereof the LORD'S heave offering to Aaron the priest.

29  Out of all your gifts ye shall offer every heave offering of the LORD, of all the best thereof, even the hallowed part thereof out of it.

Malachi 3:7-9 (King James Version) 

7  Even from the days of your fathers ye are gone away from mine ordinances, and have not kept them. Return unto me, and I will return unto you, saith the LORD of hosts. But ye said, Wherein shall we return?

8  Will a man rob God? Yet ye have robbed me. But ye say, Wherein have we robbed thee? In tithes and offerings.

9  Ye are cursed with a curse: for ye have robbed me, even this whole nation.

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.

11  And I will rebuke the devourer for your sakes, and he shall not destroy the fruits of your ground; neither shall your vine cast her fruit before the time in the field, saith the LORD of hosts.

12  And all nations shall call you blessed: for ye shall be a delightsome land, saith the LORD of hosts.