כִּ֣י יְסִֽיתְךָ֡ אָחִ֣יךָ בֶן־אִ֠מֶּךָ אֽוֹ־בִנְךָ֨ אֽוֹ־בִתְּךָ֜ א֣וֹ ׀ אֵ֣שֶׁת חֵיקֶ֗ךָ א֧וֹ רֵֽעֲךָ֛ אֲשֶׁ֥ר כְּנַפְשְׁךָ֖ בַּסֵּ֣תֶר לֵאמֹ֑ר נֵֽלְכָ֗ה וְנַֽעַבְדָה֙ אֱלֹהִ֣ים אֲחֵרִ֔ים אֲשֶׁר֙ לֹ֣א יָדַ֔עְתָּ אַתָּ֖ה וַאֲבֹתֶֽיךָ׃
Gdyby zwodził cię brat twój, syn matki twojej, albo syn twój, albo córka twoja, albo żona na łonie twojém, albo przyjaciel twój, - będący ci jako życie twoje, potajemnie, mówiąc: "Pójdźmy a służmy bogom cudzym," których nie znałeś, - ani ty, ani ojcowie twoi, -
Rashi on Deuteronomy
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.
Or HaChaim on Deuteronomy
כי יסיתך אחיך, "If your brother entices you, etc." In this paragraph the Torah teaches that enticement to sin is not only due to external sources but may be due to something within us, in fact some force born within us from the day we see the light of day. Our sages in Sanhedrin 91 derive this from Genesis 4,7: "sin rests at the door."
Rashbam on Deuteronomy
יסיתך, every advice the end result of which leads to disaster is called הסתה; examples of such meanings of the word הסתה occur in Job 2,3 ותסיתני לבלעו חנם, You have incited me against him for no reason.” Or, Kings I 21,25 אשר הסתה אותו איזבל אשתו, “at the instigation of his wife Izzevel.” Or, Chronicles II 18,2 ויסיתהו לעלות אל רמות גלעד, “he incited him to march against Ramot Gilead’ (a campaign which failed and cost Achav’s life)