Exodus 6:7-9

Young's Literal Translation

⁷ and have taken you to Me for a people, and I have been to you for God, and ye have known that I [am] Jehovah your God, who is bringing you out from under the burdens of the Egyptians;

⁸ and I have brought you in unto the land which I have lifted up My hand to give it to Abraham, to Isaac, and to Jacob, and have given it to you -- a possession; I [am] Jehovah.'

⁹ And Moses speaketh so unto the sons of Israel, and they hearkened not unto Moses, for anguish of spirit, and for harsh service.