(Devarim 13:7) "If there shall incite you (yesitecha) your brother, the son of your mother": "hasatah" (as in "yesitecha") connotes deception, as in (I Kings 21:25) "… wherein Jezebel his (Achav's) wife hesatah."

Others say "hasatah" connotes incitement, as in (I Samuel 26:19) "And now, let my lord (Saul) listen to the words of his servant (David). If the L-rd hesitecha you against me, He will be pacified with an offering." "your brother":

From (Devarim 24:16) "Fathers shall not be put to death by cause of sons, and sons shall not be put to death by cause of fathers," we learn that they (i.e., kin) do not testify against each other. We hereby infer (that to secure testimony against an inciter to idolatry) witnesses are sequestered against him.

"your brother" — your brother from your father.

"the son of your mother" — your brother from your mother.

"or your son" — in any event (i.e., even if he is a mamzer).

"or your daughter" — in any event.

"or the wife" — betrothed.

"of your bosom" — married.

"or re'acha" — your friend.

"who is as your soul" — your father and your mother.

"in secret, saying": We are hereby taught they utter their words (of incitement) only in secret, as it is written (Proverbs 7:9) "In the evening, in the close of day, in the midst of night and darkness." But words of Torah are uttered only in the open, as it is written (Ibid. 1:20) "Wisdom (Torah) sings in the streets, etc."

(Devarim, Ibid.) "Let us go and serve other gods, whom you did not know, you, nor your fathers": R. Yossi Haglili says: This is in denigration of Israel. For the idolators do not forsake what their fathers have bequeathed to them, but Israel (are amenable to) forsaking what their fathers have bequeathed to them to go and serve idolatry.