What is the intent of (Exodus, Ibid. 150 "And the seventh day, a Sabbath of resting, holy to the L–rd"? From (Leviticus 23:4) "These are the festivals of the L–rd, callings of holiness," I might think that just as the holiness of the festivals (i.e., the determination of their times by intercalation and the like) is relegated to beth-din, so, the holiness of Sabbath. It is, therefore written "and the seventh day, a Sabbath of resting, holy to the L–rd"—Sabbath is relegated to the L–rd, and not to beth-din. And thus is it written (Ibid. 14) "And you shall keep the Sabbath."