WHAT DID GOD COMMAND TO BE TITHED?
God commanded three different tenths (tithes), each with its own definition, each with its own instructions, and each with its own purpose.
THE FIRST TITHE
Leviticus 27:30-33 defines this tithe as a tenth of crops and animals in herds and flocks.
Numbers 18 gives the ordinances, or instructions, for this tithe, and commands this tithe be taken to the Levites.
Purpose of this tithe: to support the Levitical Priesthood.
Deuteronomy 14:22-27: aka The Festival Tithe - a tenth of crops, plus add to that the firstborn animals, and take to the yearly feasts.
Purpose of this tithe: "that thou mayest learn to fear the LORD thy God always"
Deuteronomy 14:28-29: aka The Three-Year Tithe aka The Poor Tithe - a tenth of crops, kept at home, and invite the Levites, widows, orphans, stranger to eat.
Purpose of this tithe: to feed the poor.
Notice in all three tithes commanded by God the tithe came from His miraculous increase of food from crops and animals. Not money. Not from anyone's income.