Midrash su Deuteronomio 18:11

We are taught in a Baraitha (Deut. 18) Inquire of the dead. This refers to one who undergoes privation and goes and spends the night in a cemetery, in order that the spirit of impurity (unholy inspiration) may rest upon him. And when R. Akiba used to read this passage, he would cry, saying: "If one who undergoes privation for the purpose that an impure spirit should rest upon him, is successful that the spirit in question rests upon him, how much the more ought a man be uccessful if he undergoes privation for the purpose that the pure spirit may rest upon him." But what can we do if our sins cause that our desire shall not be reached, as it is said (Is. 59, 2) But your iniquities have ever made a separation between you and your God." Raba said: "If the righteous would take care to be clean from any sin whatsoever, they would be able to create a world, as it is said: But your iniquities have ever made a separation." Raba created a man and sent him up to R. Zera. The latter spoke to him, and he did not answer. R. Zera exclaimed: "I see that thou wast created by one of our colleagues. It is better that thou shouldst be returned to the earth from which thou wast taken." R. Chanina and R. Oshia were accustomed to sit every eve of Sabbath studying the book of creation, and create a calf like that of the third offspring of a living cow, and they used to consume it [on Sabbath].

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."

(Devarim 18:11) "chover chaver" (one who gathers animals into one spot and divines through them): whether he gathers snakes or scorpions.