Arcana Coelestia # 8184
8184. 'Divide it' means dispersing falsity from there. This is clear from the meaning of 'dividing that sea' as dispersing the falsities arising from evil that are present in that hell; for the falsities there are seen as waters, in keeping with what has been shown above in 8099, 8137, 8148. When the pillar of angels in which the Lord is present passes through that hell the falsities depart, and as a consequence the waters there, which are the falsities, are parted asunder. From this it is evident that 'dividing the sea' means dispersing the falsities belonging to the hell that is represented by 'the Sea Suph'.
Arcana Coelestia # 432
432. Verse 24 For sevenfold will Cain be avenged, and Lamech seventy-sevenfold.
This means that men annihilated the faith meant by 'Cain', which it was utterly forbidden to violate; that at the same time they annihilated charity, which born by means of faith, something even more inviolable; and that on account of this, condemnation followed, which is 'being avenged seventy-sevenfold'.