The Talmud teaches that two ministering angels--one good and one evil--join each of us on the eve of the Sabbath. In response to this teaching, it is customary to acknowledge their presence by greeting them, blessing them, and seeking their blessing. The words to this song were written by the Kabbalists (Jewish Mystics) of the seventeenth century.
Shalom aleichem malachei hashareit, malachei elyon,
mimelech mal’chei ham’lachim hakadosh baruch hu.
Boachem l’shalom, malachei hashalom, malachei elyon,
mimelech mal’chei ham’lachim hakadosh baruch hu....