Rashi on Deuteronomy 13:7/רש"י על דברים י״ג:ז׳

1כי 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.

2אחיך THY BROTHER — means, thy brother on the father’s side (Sifrei Devarim 87:4).

3בן 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).

4חיקך [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.

5אשר 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.

6בסתר [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).

7אשר 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).