(Ibid. 13) "for it is a sign between Me and you": and not between Me and the peoples of the world. "for your generations": to be observed throughout the generations. "to know that I, the L–rd, sanctify you": What is the intent of this? From (Ibid. 16) "And the children of Israel shall keep the Sabbath," I might think, even a deaf-mute, an imbecile, and a minor. It is, therefore, written "to know that I, the L–rd, etc." I spoke only of one who has knowledge (to internalize this.)