3 For I testify that they gave as much as they were able, and even beyond their ability. Entirely on their own,

Read 2 Corinthians 8:3 Using Other Translations

For to their power, I bear record, yea, and beyond their power they were willing of themselves;
For they gave according to their means, as I can testify, and beyond their means, of their own accord,
For I can testify that they gave not only what they could afford, but far more. And they did it of their own free will.