Thematic Bible: The amount to be tithed

Then Jacob made a vow, saying, If God will be with me and will keep me in this way that I go and will give me food to eat and clothing to wear, So that I may come again to my father's house in peace, then the Lord shall be my God; And this stone which I have set up as a pillar (monument) shall be God's house [a sacred place to me], and of all [the increase of possessions] that You give me I will give the tenth to You.

And the Lord said to Aaron, You shall have no inheritance in the land [of the Israelites], neither shall you have any part among them. I am your portion and your inheritance among the Israelites. And, behold, I have given the Levites all the tithes in Israel for an inheritance in return for their service which they serve, the [menial] service of the Tent of Meeting.