Exodus 8:31

³¹ Yahweh did according to the word of Moses, and he removed the swarms of flies from Pharaoh, from his servants, and from his people. There remained not one.

Arcana Coelestia #7427

7427. 'but they could not' means that they acted to no avail. This is clear without explanation.

Thanks to the Swedenborg Society for the permission to use this translation.