John Gill

Yea, and if I be offered,.... Or "poured out", as the drink offerings of wine or oil were; meaning the effusion of his blood, which he compares to a libation, or drink offering, which was poured upon the sacrifice; and the laying down of his life for the sake of Christ, and his Gospel: which he knew not how soon might be, though he was in some hopes of a deliverance for the present, and therefore speaks of it in an hypothetical way: yet he expected it sooner or later; and that whenever it was, it would be as the libation upon the offering, Upon the sacrifice and service of your faith; he had been the means of bringing them to the faith of Christ, in which they were an offering acceptable to God, being sanctified by the Holy Ghost; see Rom 15:16; and should he suffer and shed his blood in the cause of Christ, it would be as a libation on them, as a sacrifice; it would be for the sake of preaching the doctrine of faith, by which they were brought to believe on Christ; and it would be for the further confirmation of their faith, and as a drink offering acceptable unto God; upon all which accounts it would be matter of joy to him, I joy and rejoice with you all; meaning at his sufferings and death, and the advantages thereof to Christ, to his churches, and to himself.