Nedarim

Then on the view of Beth Shammai, whence do we know that three laymen are valid?  — They deduce it from [the teaching reported by] R. Assi b. Nathan. For it is written, And Moses declared unto the children of Israel the set feasts of the Lord.  Whereon it was taught. R. Jose the Galilean said: The festivals were stated, but not the Sabbath of the Creation  with them: Ben 'Azzai said: The festivals were stated, but not the chapter on vows with them. Now, this Baraitha was unintelligible to R. Assi b. Nathan, so he went to Nehardea, before R. Shesheth. Not finding him there, he followed him to Mahuza,  and said to him: 'The festivals were stated, but not the Sabbath of the Creation with them': but the Sabbath is written together with them!  Furthermore, the festivals were stated, but not the chapter on vows with them, but that is written alongside thereof!  — Said he to him, It means this: