1 Cor. 16:1,2
Now about the collection for the Lord’s people: Do what I told the Galatian churches to do. 2 On the first day of every week, each one of you should set aside a sum of money in keeping with your income, saving it up, so that when I come no collections will have to be made.
2 Cor. 9:7
Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver.