John Calvin on Philippians 4:20-21

20 Now to our God and Father This may be taken as a general thanksgiving, by which he closes the epistle; or it may be viewed as bearing more particularly upon the last clause in reference to the liberality shewn to Paul. “La liberalite de laquelle les Philippiens auoyent vse enuers sainct Paul;” — “The liberality which the Philippians had exercised towards St. Paul.” For in respect of the assistance which the Philippians had afforded him, it became him to reckon himself indebted to them for it in such a manner as to acknowledge, that this aid had been afforded to them by the mercy of God.