Genesis 47:24
When you gather in the crop, give one-fifth of it to Pharaoh, and the rest will be yours for seed for the fields and for you to eat, including those in your households and your little children."
Genesis 41:34
Pharaoh should do this -- he should appoint officials throughout the land to collect one-fifth of the produce of the land of Egypt during the seven years of abundance.
Genesis 47:25
They replied, "You have saved our lives! You are showing us favor, and we will be Pharaoh's slaves."
Leviticus 27:32
All the tithe of herd or flock, everything which passes under the rod, the tenth one will be holy to the Lord.
1 Samuel 8:15-17
He will demand a tenth of your seed and of the produce of your vineyards and give it to his administrators and his servants.
Psalm 41:1
For the music director; a psalm of David. How blessed is the one who treats the poor properly! When trouble comes, the Lord delivers him.
Psalm 112:5
It goes well for the one who generously lends money, and conducts his business honestly.