Acts 6:3-4
In the Old Testament, the Israelites did not give the Levites what they had to give, so the Levites returned to their homeland. So Nehemiah rebuked the Israelites, called the Levites back, and had the Israelites give a tenth of their grain to the Levites. (Ne 13:10-12)
Ne 13:10 And I perceived that the portions of the Levites had not been given them: for the Levites and the singers, that did the work, were fled every one to his field. 11 Then contended I with the rulers, and said, Why is the house of God forsaken? And I gathered them together, and set them in their place. 12 Then brought all Judah the tithe of the corn and the new wine and the oil unto the treasuries.
In the early church, the apostles concentrated on praying and preaching the Word. And the saints devoted themselves financially so that the apostles could focus on prayer and preaching the Word. (Acts 6:3-4)
Acts 6:3 Wherefore, brethren, look ye out among you seven men of honest report, full of the Holy Ghost and wisdom, whom we may appoint over this business. 4 But we will give ourselves continually to prayer, and to the ministry of the word.