בִּנְיָמִין֙ זְאֵ֣ב יִטְרָ֔ף בַּבֹּ֖קֶר יֹ֣אכַל עַ֑ד וְלָעֶ֖רֶב יְחַלֵּ֥ק שָׁלָֽל׃
Benjamin is a wolf that raveneth; In the morning he devoureth the prey, And at even he divideth the spoil.’
Zohar
If so, what is the meaning of "adei ad"? It means that the strength of a person should be in the place which sustains and connects everything, and which is called "ad," as is written, "In the morning he shall devour the prey (Heb. עַד)" (Beresheet 49:27). "Ad" is the place that unites this side and that side, for sustenance and connecting, a connection that will not be destroyed.