Exodus 12:44

“And the passover of the Jews was at hand.” Inquiring into the accuracy of the most wise John (on this passage), I put myself the question, What is indicated by the addition “of the Jews”? Of what other nation was the passover a festival? Would it not have been enough to say, “And the passover was at hand”? It may, however, be the case that the human passover is one thing when kept by men not as Scripture intended, and that the divine passover is another thing, the true passover, observed in spirit and truth by those who worship God in spirit and in truth; and then the distinction indicated in the text may be that between the divine passover and that said to be of the Jews. We should attend to the passover law and observe what the Lord says of it when it is first mentioned in Scripture. …

3. But now, which is above all things most necessary, I wish to remind you, and myself with you, how that the command would have us come to the Paschal feast not profanely and without preparation, but with sacramental and doctrinal rites, and prescribed observances, as indeed we learn from the historical account, ‘A man who is of another nation, or bought with money, or uncircumcised, shall not eat the Passover.’ Neither should it be eaten in ‘any’ house, but He commands it to be done in haste; inasmuch as before we groaned and were made sad by the bondage to Pharaoh, and the commands of the task-masters. For when in former time the children of Israel acted in this way, they were counted worthy to receive the type, which existed for the sake of this feast, nor is the feast now introduced on account of the type. …