Kabbalah zu Bereschit 49:27

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.