ושמרוA universal sign for all time between Hashem and the people of Israel that we are his people and acknowledging Him as Creator.02 Sh'mot31:16-17Ki Tisarecognition, creator, sabbath, shabbat, song, singing, worshipוְשָׁמְרוּ בְנֵי יִשְׂרָאֵל אֶת הַשַּׁבָּת לַעֲשׂוֹת אֶת הַשַּׁבָּת לְדרתָם בְּרִית עוֹלָם