Le Deutéronome 18:10 Midrash : Sifra, Mekhilta d'Rabbi Yishmael, Bereishit Rabbah & Sifrei Devarim

3) who gives of his seed to the Molech": and not to other varieties (of idolatry). "who gives of his seed to the Molech": What is the intent of this? (i.e., Is it not already written (Vayikra 18:21) "And from your seed you shall not give, etc."?) (For) if from there, I might think that even if he (himself) passed (him through fire) and did not give him (to the priest of Molech to do so), he would be liable; it is, therefore, written (for emphasis) "who gives of his seed." I might think that even if he gave, but did not pass, he is still liable; it is, therefore, written (Vayikra 18:21) "And from your seed you shall not give to pass to the Molech." I might think he would be liable even if he did not pass him through fire; it is, therefore, written (Devarim 18:10) "There shall not be found among you one who passes his son or daughter through fire" "passing"-"passing" for an identity (gezeirah shavah) — Just as "passing" here is for the Molech, so "passing" there; and just as "passing" there is through fire, so, "passing" here. In sum: There must be giving, and passing, through fire, to the Molech.

6) "for of his seed he has given to the Molech": What is the intent of this? Because it is written (Devarim 18:10) "There shall not be found among you one who passes his son or daughter through fire," I might think only his son or daughter. Whence do I derive (for inclusion) the daughter of his son and the son of his daughter? From "for of his seed he has given to the Molech."

8) (Vayikra 18:3) "and in their statutes you shall not walk": What did Scripture leave unsaid (that this need be stated)? Is it not already written (Devarim 18:10) "There shall not be found among you one who passes his son or daughter through fire … (Devarim 18:11) and a chover chaver, etc."? What, then, is the intent of "and in their statutes you shall not walk"? In their customs — those things that are established for them — such as theatres, circuses, and sports. R. Meir says: These are "the ways of the Emorites," which the sages enumerated. R. Yehudah b. Betheira says: that you not preen yourself (to attract women), and not cultivate locks, and not wear the hair komi (a gentile fashion). And lest you say: "They have statutes and we have no statutes" — It is, therefore, written (Vayikra 18:9) "My judgments shall you do and My statutes you shall heed to walk in them; I am the L–rd your G d." — But there is still "hope" for the yetzer hara to reflect and say "But theirs are more beautiful than ours!" — It is, therefore, written (Devarim 4:6) "And you shall heed and you shall do. For this is your wisdom and your understanding."