וּסְקַלְתּ֥וֹ בָאֲבָנִ֖ים וָמֵ֑ת כִּ֣י בִקֵּ֗שׁ לְהַדִּֽיחֲךָ֙ מֵעַל֙ יְהוָ֣ה אֱלֹהֶ֔יךָ הַמּוֹצִיאֲךָ֛ מֵאֶ֥רֶץ מִצְרַ֖יִם מִבֵּ֥ית עֲבָדִֽים׃
Engkau harus melempari dia dengan batu sampai ia mati, sebab ia telah berusaha menyesatkan engkau dari Yang Mahakekal, Allahmu, yang telah membawa engkau keluar dari tanah Mesir, dari rumah perbudakan.
Chizkuni
באבנים ומת, “with stones so that he will die.” The stoning is to continue until the false prophet or seducer will die. If the first rock did not kill him then more rocks will be hurled at him. (Sifri) Where did the Torah issue its warning against such seducers who had not claimed to be prophets able to perform miracles? Compare verse 12 and how it is explained in the Talmud tractate Sanhedrin folio 63.
Or HaChaim
וסקלתו באבנים, "you shall pelt him with stones, etc. Zohar volume three page 272 speaks of 5 stones needed to kill Satan the enticer and describes the number as a mystical dimension of the verse שמע ישראל.
Sforno
כי בקש להדיחך, even though he did not cause tangible damage, and therefore might have thought himself immune from prosecution, as opposed to the person who incited to idolatry in the Ir Hanidachat, a city whose majority became idolaters. He is guilty of the death penalty כי בקש להדיחך, because of his attempt to convert people to idolatry. His execution will prevent him from seducing still others. Failure to execute him might result in his success.