Exodus 23:21-23

21Take ye heed before him, and hearken unto his voice; provoke him not; for he will not pardon your transgression: for my name is in him. 22But if thou shalt indeed hearken unto his voice, and do all that I speak; then I will be an enemy unto thine enemies, and an adversary unto thine adversaries. 23For mine angel shall go before thee, and bring thee in unto the Amorite, and the Hittite, and the Perizzite, and the Canaanite, the Hivite, and the Jebusite: and I will cut them off.