“On the first day of each week, you should each put aside a portion of the money you have earned.” (1 Corinthians 16:2 NLT).

THE GRACE OF GIVING
Ironically, the church in Corinth, one of the most wealthy among the 1st Century churches, was the one that Paul had to do the most teaching on generosity. In the poorer churches, like the churches in Macedonia, it seemed giving came easily. They gave with such generosity that Paul was astounded, because they gave “beyond their ability” (2 Cor. 8:3) and this, with great joy and willingness. Yet, even in Paul’s second letter to the well-to-do believers in Corinth, it is obvious that they still weren’t living with generosity.
 
Notice Paul’s helpful instruction, he taught them…
1) When to give: every Sunday “first day”
2) Who should give: every member “you should each”
3) How much to give: a portion based on your earnings
 
Corinth was wealthy in every way except in generosity. They abounded in “everything–– in faith, in speech, in knowledge” (2 Cor. 8:7), yet Paul would have them abound in the grace of giving.