Exodus 23:20-23

20Behold, I send an Angel before thee, to keep thee in the way, and to bring thee to the place that I have prepared.

21Be careful in his presence, and hearken unto his voice: do not provoke him, for he will not forgive your transgressions; for my name is in him.

22But if thou shalt diligently hearken unto his voice, and do all that I shall say, then I will be an enemy to thine enemies, and an adversary to thine adversaries.

23For mine Angel shall go before thee, and bring thee in unto the Amorites and the Hittites and the Perizzites and the Canaanites, the Hivites and the Jebusites; and I will cut them off.