Sure.
Isaiah 44:
6 Thus says Yahweh, the king of Israel, and its redeemer, Yahweh of hosts: “I am the first, and I am the last, and there is no god besides me. 7 And who is like me? Let him proclaim it! And let him declare it and set it in order for me since I established an eternal people and things that are to come, and let them tell them the things that are coming. 8 You must not tremble, and you must not be paralyzed with fear. Have I not made you hear from of old and declared it, and you are my witnesses? Is there a god besides me? And there is no rock! I know none!”
It doesn’t say anywhere in there that he is physical. Nothing pointed out so far in the Tanach (Old Testament) shows him to be physical.