Numbers 23:3-4

23:3 Balaam said to Balak, “Station yourself by your burnt offering, and I will go off; perhaps the Lord will come to meet me, and whatever he reveals to me I will tell you.” Then he went to a deserted height.

23:4 Then God met Balaam, who said to him, “I have prepared seven altars, and I have offered on each altar a bull and a ram.”