Yoreh Yoreh, Yadin Yadin/ Shoot, shoot, right, right

It is ordained for him to teach the way of life and to discuss in the house of law. The origin is in the words said when appointing a wise man to be a rabbi and a declarant ('Yoreh Yoreh' is said when appointing one to teach the way of life of prohibition and permissibility, 'Yadin Yadin' is said when appointing one to discuss the laws of wealth).

("When Rabba bar Hana went down to Babylonia, Rabbi Ḥiyya said to Rabbi: My nephew is going down to Babylonia; may he issue rulings? — May he. May he judge? — May he. May he permit firstborn animals? — May he. When Rav went down to Babylonia, Rabbi Ḥiyya said to Rabbi: My niece's son is going down to Babylonia; may he issue rulings? — May he. May he judge? — May he. May he permit firstborn animals? — No, let him not" — Sanhedrin 5a; likewise: "Or he may desire, and it will be good in Aaron's eyes, for he is good, and Yoreh Yoreh Yadin Yadin" — Or HaChaim on Leviticus chapter 10; and likewise: "The simple hour did not pass until he seized the quill and sat and wrote him a semikhah document, and wrote Yoreh Yoreh Yadin Yadin, and added some of those matters that the sages of the Talmud used when they would ordain a disciple" — Agnon, Binding of Stories, 224).

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