31 I have also another reason (the fuller discussion of which must be reserved, I think, for another opportunity, in order to prevent the present discourse from extending to larger limits than may be allowed by the necessity which rests upon us to bring this work to a conclusion) to offer in explanation of the fact that the name of Jeremiah has been permitted, or rather directed, by the authority of the Holy Spirit, to stand in this passage instead of that of Zechariah.
It is stated in Jeremiah that he bought a field from the son of his brother, and paid him money for it. That sum of money is not given, indeed, under the name of the particular price which is found in Zechariah, namely, thirty pieces of silver; but, on the other hand, there is no mention of the buying of the field in Zechariah. Now, it is evident that the evangelist has interpreted the prophecy which speaks of the thirty pieces of silver as something which has received its fulfilment only in the Lord's case, so that it is made to stand for the price set upon Him.
But again, that the words which were uttered by Jeremiah on the subject of the purchase of the field have also a bearing upon the same matter, may have been mystically signified by the selection thus made in introducing [into the evangelical narrative] the name of Jeremiah, who spoke of the purchase of the field, instead of that of Zechariah, to whom we are indebted for the notice of the thirty pieces of silver. In this way, on perusing first the Gospel, and finding the name of Jeremiah there, and then, again, on perusing Jeremiah, and failing there to discover the passage about the thirty pieces of silver, but seeing at the same time the section about the purchase of the field, the reader would be taught to compare the two paragraphs together, and get at the real meaning of the prophecy, and learn how it also stands in relation to this fulfilment of prophecy which was exhibited in the instance of our Lord.
For [it is also to be remarked that] Matthew makes the following addition to the passage cited, namely, “Whom the children of Israel did value; and gave them the potter's field, as the Lord appointed me.” Now, these words are not to be found either in Zechariah or in Jeremiah. Hence we must rather take them to have been inserted with a nice and mystical meaning by the evangelist, on his own responsibility—the Lord having given him to understand, by revelation, that a prophecy of the said tenor had a real reference to this occurrence, which took place in connection with the price set upon Christ.
Moreover, in Jeremiah, the evidence of the purchase of the field is ordered to be cast into an earthen vessel. In like manner, we find in the Gospel that the money paid for the Lord was used for the purchase of a potter's field, which field also was to be employed as a burying-place for strangers. And it may be that all this was significant of the permanence of the repose of those who sojourn like strangers in this present world, and are buried with Christ by baptism. For the Lord also declared to Jeremiah, that the said purchase of the field was expressive of the fact that in that land [of Judæa] there would be a remnant of the people delivered from their captivity. I judged it proper to give some sort of sketch of these things, as I was calling attention to the kind of significance which a really careful and painstaking study should look for in these testimonies of the prophets, when they are reduced to a unity and compared with the evangelical narrative.
These, then, are the statements which Matthew has introduced with reference to the traitor Judas.
Source: The Harmony of the Gospels (New Advent)