As eating olive berries causes one to forget things that he has known for seventy years, so olive oil brings back to the memory things which happened seventy years before.
Ibid., fol. 13, col. 2,
The outside of the shell of the purple mollusk resembles the sea in color; its bodily conformation is like that of a fish; it rises once in seventy years; its blood is used to dye wool purple, and therefore this color is dear.
Menachoth, fol. 44, col. 1.
The bearing-time of the flat-headed otter lasts seventy years; a parallel may be found in the carob-tree, from the planting to the ripening of the pods of which is seventy years.
Berachoth, fol. 8, col. 1.
The Sanhedrin consisted of seventy-one members. It is recorded that Rabbi Yossi said, "Seldom was there contention in Israel, but the judicial court of seventy-one sat in the Lishkath-hagazith, i.e., Paved Hall, and two (ordinary) courts of justice consisting of twenty-three, one of which sat at the entrance of the Temple-Mount, and the other at the entrance of the ante-court; and also (provincial) courts of justice, also comprising twenty-three members, which held their sessions in all the cities of Israel. When an Israelite had a question to propose, he asked it first of the court in his own city. If they understood the case, they settled the matter; but if not, they applied to the court of the next city. If the neighboring justices could not decide, they went together and laid the case in debate before the court which held its session at the entrance of the Temple-Mount. If these courts, in turn, failed to solve the problem, they appealed to the court that sat in the entrance of the ante-court, where a discussion was entered into upon the moot points of the case; if no decision could be arrived at, they all referred to the (supreme) court of seventy-one, where the matter was finally decided by the majority of votes."
As the disciples of Shammai and Hillel multiplied who had not studied the law thoroughly, contentions increased in Israel to such an extent that the law lost its unity and became as two.
Sanhedrin, fol. 88, col. 2.