Deuteronomy 13:7

Namely, of the gods of the people which are round about you,.... As of the Edomites, Moabites, Ammonites, and Phoenicians:

nigh unto thee; as the above were, being on the borders of their land: the Targum of Jonathan interprets this of the idols of the seven nations, that is, of the land of Canaan: or

far off from thee; as the Babylonians, Persians, and others:

from the one end of the earth even unto the other end of the earth; which includes all the idols in the world, worshipped by whatsoever nation, and which were forbidden; and which shows the universality of idolatry in those times, and that that is an insufficient argument in its favour. Jarchi interprets this of the sun and moon, and the host of heaven, who go from one end of the world to the other; and this seems to have been the first and most common idolatry of the Gentile world, and which were worshipped in the several deities they set up.

John Gill's Exposition of the Whole Bible (1746–1763) — public domain (CC PDM 1.0). Text via the HelloAO Bible API.

He arms against the preference of the universality of this idol worship, wherewith they were like to be oft assaulted.

Matthew Poole's English Annotations on the Holy Bible (1683–1685) — public domain. Text from a community e-Sword/MySword module.

The second case was when the temptation to idolatry proceeded from the nearest blood-relations and friends. The clause, "son of thy mother," is not intended to describe the brother as a step-brother, but simply to bring out the closeness of the fraternal relation; like the description of the wife as the wife of thy bosom, who lies in thy bosom, rests upon thy breast (as in Deu 28:54; Mic 7:5), and of the friend as "thy friend which is as thine own soul," i.e., whom thou lovest as much as thy life (cf. Sa1 18:1, Sa1 18:3). בּסּתר belongs to יסית: if the temptation occurred in secret, and therefore the fact might be hidden from others. The power of love and relationship, which flesh and blood find it hard to resist, is placed here in contrast with the supposed higher or divine authority of the seducers. As the persuasion was already very seductive, from the fact that it proceeded from the nearest blood-relations and most intimate friends, and was offered in secret, it might become still more so from the fact that it recommended the worship of a deity that had nothing in common with the forbidden idols of Canaan, and the worship of which, therefore, might appear of less consequence, or commend itself by the charm of peculiarity and novelty. To prevent this deceptive influence of sin, it is expressly added in Deu 13:8 (7), "of the gods nigh unto thee or far off from thee, from the one end of the earth even unto the other end of the earth," i.e., whatever gods there might be upon the whole circuit of the earth.

Keil & Delitzsch — Biblical Commentary on the Old Testament (1861–1891) — public domain (CC PDM 1.0). Text via the HelloAO Bible API. (Old Testament only.)

כי יסיתך IF [THY BROTHER …] ENTICE THEE — The term יסת always denotes to “stir up”, “to incite”, as it is said, (I Samuel 26:19) ”If it be the Lord that hath stirred thee up (הסיתך) against me” (Sifrei Devarim 87:2); inciter in O. F., Engl, to incite — i.e. that he induces one to act thus.

אחיך THY BROTHER — means, thy brother on the father’s side (Sifrei Devarim 87:4).

בן אמך THE SON OF THY MOTHER — i.e., thy brother on the mother’s side. (The meaning of the Hebrew words is: thy brother or the son of thy mother) (Sifrei Devarim 87:5).

חיקך [OR THE WIFE OF] THY BOSOM — i.e. who lies on thy bosom and is attached (מחוקה) to you, affichee in O. F. Similar is the expression (Ezekiel 43:14) “and from the bottom (מחיק) upon the ground” — i.e. from the foundation that is sunk in the ground.

אשר כנפשך [OR THY FELLOWMAN] WHO IS AS THINE OWN SOUL — Thus refers to thy father (Sifrei Devarim 87:11). Scripture specially mentions all those who are dear to you — that you must not consent unto them nor spare them (v. 9), how much the less should you consent unto others or spare them.

בסתר [IF THY BROTHER ENTICE THEE] SECRETLY — Scripture speaks of what usually occurs (but does not intend to exclude one who entices people publicly), for usually the words of the enticer are spoken in secret. Similarly does Solomon say of the strange woman that she practises her art of seduction (Proverbs 7:9) “In the twilight, in the evening of the day, in the blackness of night and the darkness” (Sifrei Devarim 87:12).

אשר לא ידעת אתה ואבתיך [LET US GO AND SERVE OTHER GODS] WHICH THOU HAST NOT KNOWN, THOU, NOR THY FATHERS — This would be a great disgrace for you: for not even the heathen nations abandon that which their fathers have handed down to them, and this man says to you, “Abandon what thy fathers have handed down to you”! (Sifrei Devarim 87:13).

Rashi on the Tanakh — English translations: “The Judaica Press complete Tanach with Rashi, translated by A. J. Rosenberg” (CC BY 4.0); “Pentateuch with Rashi's commentary by M. Rosenbaum and A.M. Silbermann, 1929-1934” (public domain); “The Metsudah Tanach series, Lakewood, N.J” (CC BY 4.0); and “The Book of Joshua, Metsudah Publications, 1997” (CC BY 4.0). Text via Sefaria.