אֶת־שַׁבְּתֹתַ֣י תִּשְׁמֹ֔רוּ וּמִקְדָּשִׁ֖י תִּירָ֑אוּ אֲנִ֖י יְהוָֽה׃
Meine Schabbatot beobachtet und meine Heiligtümer ehret. Ich bin der Herr.
Zohar
Rabbi Elazar opened the discussion with the phrase, "You shall keep My Sabbaths" (Lev. 19:30). Come and see: the Holy One, blessed be He, created the world in six days. And on each day He revealed His actions and gave that day His strength. But when did He actually reveal His actions and give His strength? This happened on the fourth day! Because the first three days were all undisclosed and nothing appeared. But as soon as the fourth day arrived, He revealed His action and shared His strength with all!