Exodus 20:23-24

23Do not make any idols to take my place. Do not use silver or gold to make an idol that you will worship.

24Instead, use earth to make an altar for me. You must offer sacrifices to me on the altar. You may take your sheep, your goats or your cows to make burnt offerings or friendship offerings or other sacrifices to me. Make an altar like this in any place that I choose for you to worship me. In those places, I will come to you and I will bless you.