Exodus 20:25

20:25 If you make me an altar of stone, you must not build it of stones shaped with tools, for if you use your tool on it you have defiled it.

Exodus 34:12

34:12 Be careful not to make a covenant with the inhabitants of the land where you are going, lest it become a snare among you.

Exodus 8:21-22

8:21 If you do not release my people, then I am going to send swarms of flies on you and on your servants and on your people and in your houses. The houses of the Egyptians will be full of flies, and even the ground they stand on. 8:22 But on that day I will mark off the land of Goshen, where my people are staying, so that no swarms of flies will be there, that you may know that I am the Lord in the midst of this land.

Exodus 17:12

17:12 When the hands of Moses became heavy, they took a stone and put it under him, and Aaron and Hur held up his hands, one on one side and one on the other, and so his hands were steady until the sun went down.