Luke 9:33-34

And as these [men, Moses and Elijah] were leaving Him, Peter said to Jesus, “Master, it is delightful and good for us to be here; we should make three [sacred] tents; one for You, one for Moses, and one for Elijah”—not realizing what he was saying. But even as he was saying this, a cloud formed and began to overshadow them; and they were [greatly] afraid as they entered the cloud.