Tobit 1:7

7 Of all my produce I would give a tenth to the sons of Levi who ministered at Jerusalem; a second tenth I would sell, and I would go and spend the proceeds each year at Jerusalem;

Tobit 1:7 In-Context

5 All the tribes that joined in apostasy used to sacrifice to the calf Baal, and so did the house of Naphtali my forefather.
6 But I alone went often to Jerusalem for the feasts, as it is ordained for all Israel by an everlasting decree. Taking the first fruits and the tithes of my produce and the first shearings, I would give these to the priests, the sons of Aaron, at the altar.
7 Of all my produce I would give a tenth to the sons of Levi who ministered at Jerusalem; a second tenth I would sell, and I would go and spend the proceeds each year at Jerusalem;
8 the third tenth I would give to those to whom it was my duty, as Deborah my father's mother had commanded me, for I was left an orphan by my father.
9 When I became a man I married Anna, a member of our family, and by her I became the father of Tobias.
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.