"to sanctify it": with a blessing — whence they ruled: It is sanctified by wine (i.e., "kiddush") upon its entry. This tells me only of kiddush at night. Whence do I derive (the same for)kiddush in the daytime? From "Remember the day of Sabbath." This tells me only of (kiddush for) the Sabbath. Whence do I derive (the same for) the festivals? From (Leviticus 23:4) "These are the festivals of the L–rd, which (including the Sabbath) you shall "call" (in the kiddush) in their times."