The word tithe means “to give a tenth.” Prior to the giving of the Mosaic Law (ca. 1445 B.C.), we see an example of Abraham giving Melchizedek a tenth of the spoils of war which he had accumulated after he had defeated Chedorlaomer at the Valley of Shaveh (Gen 14:17-20). Later, Jacob made a vow to give God a tenth of his possessions if God would be faithful to protect him on a journey (Gen 28:20-22). In the accounts of Abraham and Jacob, there was no mandate from heaven for them to give a tenth, and when they did give a tenth, it appears to be a one-time act, never repeated as far as Scripture is concerned. It was not until several centuries later that tithing became mandatory for the nation of Israel when they entered into the Mosaic Covenant and came under the Mosaic Law. Click here for full article: https://thinkingonscripture.com/2020/06/27/giving-or-tithing/