“Every tithe of the land, whether of the seed of the land or of the fruit of the trees, is the Lord's; it is holy to the Lord. If a man wishes to redeem some of his tithe, he shall add a fifth to it. And every tithe of herds and flocks, every tenth animal of all that pass under the herdsman's staff, shall be holy to the Lord” (Lev. 27:30-32 ESV).
But before faith came, we were kept in custody under the law, being shut up to the faith which was later to be revealed. Therefore the Law has become our tutor to lead us to Christ, so that we may be justified by faith. But now that faith has come, we are no longer under a tutor. For you are all sons of God through faith in Christ Jesus (Galatians 3:23-26 NAS).
Now concerning the collection for the saints: as I directed the churches of Galatia, so you also are to do. On the first day of every week, each of you is to put something aside and store it up, as he may prosper... (1 Corinthians 16:1-3).
We want you to know, brothers, about the grace of God that has been given among the churches of Macedonia, for in a severe test of affliction, their abundance of joy and their extreme poverty have overflowed in a wealth of generosity on their part. For they gave according to their means, as I can testify, and beyond their means, of their own accord, (2 Corinthians 8:1-3 NAS).
Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver. (2 Corinthians 9:7 ESV).