167 Chagigah 1/7-8 & 2/1-2

(7) Rabbi Shimon ben Menassia says: What is "a crooked thing that cannot be fixed"? This applies to one who had relations with a forbidden woman and fathers a mamzer through her. If you would say [the verse refers to] a thief or a robber, he can return it and make amends. Rabbi Shimon ben Yochai says: One is only called "crooked" if he was proper at first and became crooked; and who is that? A Sage who separates from Torah.

(8) Dissolving vows flies in the air, there is no basis for it. Laws concerning shabbat and festival-offering and stealing from holy-designated things, these are like mountains hung from a hair: they have few verses and many laws. Judgment and service and purity and impurity and improper sexual relations, they have plenty to be based on. They themselves are the body of Torah.

(1) One may not expound the laws of forbidden sexual relations before three people, nor the account of Creation before two, nor the Divine Chariot before one, unless he is wise and understanding from his own knowledge. Anyone who looks into four things would be better off if he had not come into this world: what is above, what is below, what is before, and what is after. And anyone who has no consideration for the honor of his Maker would be better off if he had not come into the world.

(2) Yose ben Yoezer says not to lean hands [on the Chagigah sacrifice]; Yose ben Yohanan says to lean hands. Yehoshua ben Perahia says not to lean hands; Nitai the Arbelite says to lean hands. Yehuda ben Tavai says not to lean hands; Shimon ben Shetach says to lean hands. Shemaya says to lean hands; Avtaliyon says not to lean hands. Hillel and Menahem did not disagree. Menahem left and Shammai entered. Shammai says not to lean hands; Hillel says to lean hands. The first [of each pair] was the nasi [head of the Sanhedrin] and the second [of each pair] was the av beit din [vice-head of the Sandhedrin].