זוהר בראשית — דף רכז ע”א

Whoever fulfills the commandments merits a portion in the World to Come. When a person dies, all his commandments accompany him and become his garments in the supernal world. Naphtali is the tribe of the swift hind, said to give beautiful words. All the Torah was preserved in the mouth of the tribe of Naphtali. Thus the commandments of the righteous are their garments in the World to Come.