What the Bible says about Tithing as a Tenth
(From Forerunner Commentary)

Genesis 28:22 Tithing, in its simplest form, is returning one-tenth of one's income to God for His use. The patriarch Jacob, knowing about God's command to tithe, promises to give God a tenth of his blessing or increase. Richard T. Ritenbaugh Tithing (1995) Related Topics: Jacob's Tithe | Tithe As One Tenth | Tithing