The principle of the tithe — giving a tenth — did not originate with the Mosaic Law. It was practiced by the patriarchs centuries before Sinai. In Genesis 14, after Abraham's victory over the kings who had taken Lot captive, he gave tithes of all to Melchizedek, king of Salem and priest of the most high God. This was a voluntary act of worship and acknowledgment that everything Abraham possessed came from God. The tithe was an expression of faith before it was ever a commandment.
Jacob likewise vowed to give a tenth to God at Bethel, declaring, "of all that thou shalt give me I will surely give the tenth unto thee" (Genesis 28:22). These pre-Law examples demonstrate that the tithe is not merely an Old Testament legal obligation that has been abolished — it is a timeless principle of honoring God with the firstfruits of our increase, rooted in the very nature of our relationship with our Creator and Provider.
When the Law was given at Sinai, God codified the tithe as a requirement for Israel, designating it for the support of the Levites, the maintenance of the tabernacle and temple, and the care of the poor. But the principle behind the Law is older than the Law itself. Abraham tithed not because he was commanded to, but because he recognized that God was the source of every blessing he possessed.