Leviticus 20:5
4 If, however, the people of the land shut their eyes to that man when he gives some of his children to Molech so that they do not put him to death, 5 I myself will set my face against that man and his clan. I will cut off from the midst of the people both him and all who follow after him in spiritual prostitution, committing prostitution by worshiping Molech. 6 “‘The person who turns to the spirits of the dead and familiar spirits to commit prostitution by going after them, I will set my face against that person and cut him off from the midst of his people.
Onkelos Leviticus 20:5
4 And if the people of the house of Israel turn away (or hide) their eyes from that man when he giveth his offspring to Molek, that they may not have to put him to death, 5 I will give forth My anger against that man, and against his helpers, and will destroy him, and all who go after him, to wander after Molek, from among their people. 6 And the man who turneth away after impostors and diviners to wander after them, I will set My displeasure upon that man, and will cut him off from among his people.
Notes and References
"... "Helpers" ... Sifra and the Babylonian Talmud, Shevuot 39a, report R. Simeon's question: “Did the family sin [so that they should also be punished]?” Doesn't Deuteronomy 24:16 forbid killing children for their parents’ sin? ... Our targumist avoids the complex theological difficulty by explaining scripture's “family” as “helpers.” Later commentators offer similar answers. Family members are punished only when they hide their eyes and shield him (Sforno). He alone is killed; the rest of the family suffers aggravation (Sifra and Rashi) ..."
Drazin, Israel, and Stanley M. Wagner Onkelos on the Torah, Leviticus: Understanding the Bible Text (p. 158) Gefen, 2006