Tithing was introduced in the old testament by God to the
people of Israel. The context of tithing was for the people on behalf of
the Leviticus priesthood.
The Levites (Leviticus priesthood) did not own land so they
were not able to make gains in personal supplies for themselves and
household, so God commanded the people of Israel to give unto the Levites
(into the storehouse). What was given was the produce that came from the land.
Money existed in the old testament then, but God directed produce from the
land be given (not money).
Here are three presentations that explain the practice of
tithing by the word of God –
TTGM: Many church leaders today teach the doctrine of tithing
out of context using voodoo interpretations – see presentation 2. What they
should be teaching is the ministry of giving (and not money only). To all
truth and it will be well with you and your household.