Numbers 22:21

18 Balaam answered the servants of Balak, "If Balak would give me his house full of silver and gold, I can't go beyond the word of the Lord my God, to do less or more.

19 Now therefore, please wait also here this night, that I may know what the Lord will speak to me more."

20 God came to Balaam at night, and said to him, "If the men have come to call you, rise up, go with them; but only the word which I speak to you, that you shall do."

21 Balaam rose up in the morning, and saddled his donkey, and went with the princes of Moab.

22 God's anger was kindled because he went; and the angel of the Lord placed himself in the way for an adversary against him. Now he was riding on his donkey, and his two servants were with him.

23 The donkey saw the angel of the Lord standing in the way, with his sword drawn in his hand; and the donkey turned aside out of the way, and went into the field: and Balaam struck the donkey, to turn her into the way.

24 Then the angel of the Lord stood in a narrow path between the vineyards, a wall being on this side, and a wall on that side.