Luke
Acts 15:11BSB·traditional attribution

On the contrary, we believe it is through the grace of the Lord Jesus that we are saved, just as they are.”

John Calvin Reformed @genevareformer

11. By the grace of Jesus Christ. Peter compareth these two together as contrary the one to the other; to have hope “Spem salutis,” hope of salvation. in the grace of Christ, and to be under the yoke of the law; which comparison doth greatly set out the justification of Christ, inasmuch as we gather thereby, that those are justified by faith who, being free...

Matthew Henry Presbyterian @wholebiblehenry

We have here a council called, not by writ, but by consent, on this occasion (Act 15:6): The apostles and presbyters came together, to consider this matter. They did not give their judgment separately, but came together to do it, that they might hear one another's sense in this matter; for in the multitude of counsellors there is safety and satisfaction.

Commenting on Acts 15:6-21

John Gill Reformed Baptist @doctorgill

But we believe,.... Who are circumcised; the Arabic version adds, "and are sure"; for what follows is a sure and certain article of faith: that through the grace of the Lord Jesus Christ; not through circumcision, or by any works of the law, moral or ceremonial; but through the grace of Christ undertaking for them, assuming their nature, and dying in their room and stead...