Exodus 23:20-23

20 'Look, I am sending an angel to precede you, to guard you as you go and bring you to the place that I have prepared.

21 Revere him and obey what he says. Do not defy him: he will not forgive any wrong-doing on your part, for my name is in him.

22 If, however, you obey what he says and do whatever I order, I shall be an enemy to your enemies and a foe to your foes.

23 My angel will precede you and lead you to the home of the Amorites, the Hittites, the Perizzites, the Canaanites, the Hivites and the Jebusites, whom I shall exterminate.