"and it shall be on the sixth day that they shall prepare what they shall bring": From here it is derived that one makes an eruv on the eve of a festival for the Sabbath. (Exodus 16:5) "and it shall be mem-shin-nun-heh": bread that is "meshuneh" (different). You say, bread that is different, but perhaps (the intent is) bread that is double (mishneh)? (this is not so, for) (Ibid. 22) "two omers for each one" (on the sixth day) already speaks of bread that is double.