They shall know... — i.e., My after care of them will prove me the same loving and all-powerful God whose help effected their deliverance from the bondage of Egypt.
Related Commentaries of Exodus 29:46
Exodus 29:46
46 And they shall know that I am the LORD their God, that brought them forth out of the land of Egypt, that I may dwell among them: I am the LORD their God.