English of Core Text: “And He blessed and sanctified” — with what did He bless it and sanctify it? He blessed it with the manna and sanctified it with the manna.
On the daf / in context: The Mechilta explains the blessing and sanctification of Shabbos as referring to the double portion of manna that fell on Friday and the absence of manna on Shabbos itself.
Type of Learning: Custom (blessing/sanctification via the manna)What Is Learned: Shabbos was blessed and sanctified through the miracle of the manna (double portion on Friday, none on Shabbos).