And they shall know that I am the Lord their God
By his presence with them, by the blessings bestowed upon them, by his care of them, and kindness to them:
that brought them forth out of the land of Egypt, that I may dwell
not only did he bring them from thence, that they might dwell in the land of Canaan, but that he might dwell among them, which was by far the greatest mercy; and not only that they might be delivered from the bondage and affliction with which they were sorely pressed, but that they might be a free people, under the protection of their King and their God, in the midst of them; all which was a great encouragement to them, and an obligation on them to attend the service of the sanctuary, and to obey the Lord in whatsoever he had enjoined or should command them:
I am the Lord their God;
of which he had given full proof and evidence by what he had done for them, and would yet give more; and to have the Lord our God is the greatest happiness that can be enjoyed, see ( Psalms 33:12 ) ( 144:15 ) .