George Leo Haydock

And if I be made a victim upon the sacrifice [5] and service of your faith, I rejoice, &c. The sense of these obscure words seems to be: that I shall rejoice, and you also may rejoice and congratulate with me, if after having first offered up your faith and obedience to the gospel, as an acceptable sacrifice to God, I myself (or my blood, by martyrdom) be also added, and poured out as a second sacrifice upon the other. It is to be understood with an allusion to those sacrifices of the old law called libations, consisting of liquid things, as wine, oil, blood, which were poured out, or at least sprinkled, upon other victims and things sacrificed: so that he compares the shedding of his blood to these libations, and their submission to the faith of Christ to the sacrifice before offered to God. (Witham)