2 Corinthians 8:11

Now therefore perform the doing of it The words perform, performance, in this verse should rather be rendered complete, completion. See ch. 2 Corinthians 7:1, where the participle of the same verb is rendered perfecting, also 2 Corinthians 8:6 of this chapter. The sense is, -you made a resolution last year to do a certain work. Carry out that resolution now, and let the completion of the task bear witness, as far as your ability goes, to the genuineness of the resolution you then made."

out of that which you have i.e. according to your means. See note on 2 Corinthians 8:2.