“The rest of the grain offering belongs to Aaron and his sons; it
is a most holy part of the food offerings presented to the Lord.” Leviticus 2:10
Just
like religious leaders today, the priests lived off offerings. They were allowed to eat a portion of the
offerings brought to be sacrificed.
Money or precious metals that were donated went to a treasury to help
build the tabernacle and temple.
By
the time of the New Testament, we see some corruption happening and the
religious leaders making money off some transactions happening in the temple
(Jesus wasn’t happy about it).