'The children of Israel,' in Isaiah 14:2, signify the Gentiles.

In Jeremiah 23:8, 'Israel' represents the spiritual natural church.

(Riferimenti: Apocalypse Explained 768)

633. 14:9 Then a third angel followed them, saying with a loud voice. This symbolizes still more from the Lord concerning people caught up in faith divorced from charity.

A third angel following the prior ones symbolizes still more from the Lord that follows in the line of thought, for in the highest sense an angel means the Lord (no. 626). That is because, when an angel utters the Word, as in the present instance, he does not speak on his own, but from the Lord. To say with a loud voice symbolizes what follows, the subject of which is the damnation of those people who in life and in doctrine confirm themselves in a faith divorced from charity.

The subject in verses 1-5 of this chapter is the New Christian Heaven, and in verses 6 and 7 a preaching of the gospel, namely, the gospel of the Lord's advent to establish a new church. And because people caught up in a faith divorced from charity stand in the way, there follows now the threat and warning of damnation to people who still persist in that faith.