קבלה אויף מלכים ב 2:15

As you see, Shabbat dwells in HaShem’s-יהו"ה storehouse, blessed is He, and as you already know, His storehouse is His quality of Lordship-Adona”y-אדנ"י. Therefore, whosoever keeps the Shabbat according to Torah law (Halachah) brings these two qualities together and unifies them, one with the other, and when these two qualities come together, all the Sefirot then unify. This is the matter of Rest-Menuchah-מנוחה, which rests within HaShem’s-יהו"ה quality of Lordship-Adona”y-אדנ"י, as it states,⁹⁵Kings II 2:15 “the spirit of Eliyahu has rested-Nachah-נחה upon Elisha,” and it states,⁹⁶Exodus 20:11 “and He rested-VaYanach-וינח on the seventh day.” Therefore, in the Ten Commandments it states, Remember-Zachor-זכור and Keep-Shamor-שמור.