The first mention of tithing in the Bible is in Genesis chapter 14, when Abram voluntarily gives a tenth to the high priest. Why would he do that? When God called Abram in Genesis 12, He promised to make him a great nation, even though his wife was barren, and bless all the families of the world through him. There is an instructive pattern for us in Abram’s behavior: when he tries to preserve his own life, things don’t go well; when he comes back to the place of God’s promise, he prospers.
Scriptures: Genesis chapters 12:-1-13:18