7692. 'On tree and on plant of the field' means belonging to the things the Church recognized and knew. This is clear from the meaning of 'a tree' as a recognition of truth, dealt with just above in 7690; and from the meaning of 'a plant of the field' as a known fact about truth, also dealt with above, in 7689.

7689. 'And they devoured every plant in the land' means that it consumed every known fact about truth. This is clear from the meaning of 'devouring' as consuming; and from the meaning of 'a plant in the land' as a known fact about truth. For 'a plant in the field' means a truth that the Church possesses, 7571, because 'the field' is the Church, but 'a plant in the land' means a known fact about truth, because 'the land' here is the natural mind, and truth as it exists in the natural mind is factual knowledge. Furthermore the evil are not in possession of any truth of faith, only of knowledge about the truth of faith. Some evil people within the Church are convinced that they do possess the truth of faith, but they do not; they are ruled by falsity and opposed to the truth of faith. The falsity they are ruled by is deeply hidden within them as long as they are in the world, but that deeply hidden falsity emerges and reveals itself in the next life when they undergo vastation of the truths of faith they had known.