In verse 37, Samuel notes that they are surrounded by demons, and “by the angels of him who hath sought to destroy our souls.” They have been invited because of the pride of the people, and their falling away from the true way of God. They will have destroyed the land and the wealth, and then, finally, perhaps the people will be sufficiently humble to repent and prevent the loss of their souls.
As humans, we always expect that we have time to fix wrongs, but Samuel declares that such a time is no longer in the future. It is now. They must listen to his words now, and repent now.
There is no chapter break at this point in the 1830 edition.