The interpretation timeline
Deuteronomy 26:3 Douay-Rheims

And thou shalt go to the priest that shall be in those days, and say to him: I profess this day before the Lord thy God, that I am come into the land, for which he swore to our fathers, that he would give it us.

1105 – 1771 3 witnesses

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
אשר יהיה בימים ההם [AND THOU SHALT GO UNTO THE PRIEST] THAT SHALL BE IN THOSE DAYS — These apparently redundant words suggest: you have none else than the priest who lives in your days (you are only concerned with him) (cf. Sifrei Devarim 298:3; Rosh Hashanah 25b; see also Rashi on Deuteronomy 17:9). ואמרת אליו AND SAY UNTO HIM that you are not ungrateful (Sifrei Devarim 299:1). הגדתי היום I PROFESS THIS DAY — [the expression "this day" implies that the declaration is made] one once a year, but not twice a year [even when bringing from a different fruit or crop] (Sifrei Devarim 299:2).”
Source
1270
A.D.
Ramban Jewish
1194–1270
“AND THOU SHALT COME UNTO THE PRIEST THAT SHALL BE IN THOSE DAYS — to the priest that shall be there in those days, for first-fruits, like all offerings, are given to the men of the [priestly] Division [who are assigned to the Sanctuary for a week at a time], but he may not bring along a priest from his city in order to offer him his first-fruits. Now, Rashi wrote: “You have none else than the priest who lives in your days as he is.” But I have not understood this, for in the case of an elder [of the Sanhedrin] it is proper to say [and thou shalt come …] unto the judge that shall be in those days, meaning that even though he is not as great and wise as the early judges in the ages which were before us, still he [the elder] is obligated to hearken to him [the judge], for “Jephtah in his generation is as Samuel in his generation.” But when bringing first-fruits, to whom shall he bring them if not to the priest that shall be in his days? Now, I have also seen the following text in the Sifre: 298. “And thou shalt come unto the priest that shall be in those days. This is what Rabbi Yosei the Galilean says, And would it occur to you to come to the priest that is not in your days? Rather, [I must say that the verse requires one to come to] the priest who is considered by you to be established and fit in those days. Kinsmen who have ceased to be kinsmen are qualified. And so it is also said, Say not thou: ‘How was it that the former days were better than these?’ ” thus refers to “the judges of the former days.” Do not say that the judges of the former generations were better than those of the present, and therefore I would not listen to them. Instead you are to listen to them, for you are only concerned with them (Maharsha, Rosh Hashanah 25b). It appears that the Sages interpreted in this connection that if one brought first-fruits or a burnt-offering to a priest who was presumed to be qualified and afterwards it was discovered that he was the son of a divorced woman, [a defiled priest not entitled to perform the Divine Service, nor to receive the priestly gifts] the offerings are nevertheless valid, as is mentioned in the last chapter of Tractate Kiddushin. Also included in this principle is [the rule] that a kinsman who has ceased to be a kinsman is qualified, this applying to an elder who may not be judged by a relative, but it is not relevant to first-fruits. HIGAD’TI’ (I PROFESS) THIS DAY. “Through this fruit which I have brought I profess and give thanks to the Eternal your G-d Who brought me into the Land which He swore unto our fathers to give us. Thus G-d fulfilled His words, and I give thanks and praise to His Name.” The meaning of the word higad’ti is like “I have told.” So also ‘vayageid Mosheh’ (and Moses told) the words of the people unto the Eternal, which is in the past, when he has not made yet his declaration. Therefore Ramban writes that the very act of bringing the first-fruits into the Sanctuary Court constitutes a form of professing the omnipotence of G-d and an expression of thanksgiving to Him. In this sense the form of the word higad’ti is properly in the past, since the act of bringing the first-fruits has formed the way of communicating these thoughts. Such a usage is seen in the verse vayegeid Mosheh, which means that Moses “communicated” the words of the people to the Eternal. which means communicating. Or the interpretation thereof may be as follows: “I declare to you, O priest, and to all who stand by, and this declaration is unto the Eternal thy G-d, that is to say, to His Name, that I am come into the Land which He swore unto our fathers, for it is He Who brought me [near] to Him to serve Him in the Land.””
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And thou shalt go unto the priest that shall be in those days,.... Whose course and turn it would be to minister before the Lord; though, according to the Targum of Jonathan, it was the high priest they were to apply to on this occasion; and so Aben Ezra observes, that this law is obligatory all the time there is an high priest, as if it was not binding when there was none, and all depended on him; who in this case was typical of Christ our high priest, to whom we must bring, and by him offer up, the sacrifice of praise, even the fruit of our lips, giving thanks to God for all his mercies: and say unto him; what follows, and the basket of firstfruits all the while on his shoulder (d), even if a king: I profess this day; it being done once in a year, and not twice, as Jarchi notes: unto the Lord thy God; directing his speech to the priest: that I am come into the country which the Lord sware unto our fathers for to give us; and not only come into it, but was in the possession of it, and in the enjoyment of the fruits of it; of which the basket of firstfruits he had brought on his shoulder was a token. The natural and moral use of these firstfruits to the Israelites, and the bringing of them, was hereby to own and acknowledge that God was the proprietor of the land of Canaan; that they had it by gift from him, and that they held it of him, the firstfruits being a sort of a small rent they brought him; and that he was faithful to his oath and promise he had made to their fathers, and which they professed with great humility and thankfulness. The typical use of them was to direct to Christ himself, the firstfruits of them that sleep in him, the first begotten from the dead, the pledge and earnest of the resurrection of his people; to the Spirit of God and his grace, which are the earnest of glory; and to the first converts among Jews and Gentiles, in the first times of the Gospel; to Christians in general, who are the firstfruits of God and of the Lamb, and to their sacrifices of praise and thankfulness they are to offer up to God through Christ, which are acceptable to him through him; and whereby they glorify him as the author of all their mercies, to whom they are to bring their best, and in the first place; see Co1 15:20. (d) Misn. Biccurim, c. 3. sect. 4, 6. Maimon. Biccurim, c. 3. sect. 12.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.