Rabbi Yochanan said:—None were elected to sit in the High Council of the Sanhedrin except men of stature, of wisdom, of imposing appearance, and of mature age; men who knew witchcraft and seventy languages, in order that the High Council of the Sanhedrin should have no need of an interpreter.
Sanhedrin, fol. 17, col. 1.
Yehudah and Chiskiyah, the sons of Rabbi Cheyah, once sat down to a meal before Rabbi (the Holy) without speaking a word. “Give the boys some wine,” said Rabbi, “that they may have boldness to speak.” When they had partaken of the wine, they said, “The son of David will not come until the two patriarchal houses of Israel are no more,” that is, the head of the Captivity in Babylon and the Prince in the land of Israel; for it is written (Isa. viii. 14), “And he shall be for a sanctuary, and for a stone of stumbling and a rock of offense to both the houses of Israel.” “Why, children,” said Rabbi (who was patriarch of Tiberias), “you are thrusting thorns into my eyes.” Rabbi Cheyah said, “Do not be offended at them. Wine is given with seventy, and so is a secret (the numerical value of each of these words is seventy); when wine enters the secret oozes out.”
Ibid., fol. 38, col. 1.
A certain star appears once in seventy years and deceives the sailors (who guide their vessels by the position of the heavenly bodies; and this star appears sometimes in the north and sometimes in the south.—Rashi.)
Horayoth, fol. 10, col. 1.
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.