In Psalm 5:9, this signifies hell in place of the understanding of truth. (Apocalypse Explained 659[7]) Throat here relates to evil, and the tongue of speaking to falsities. (Arcana Coelestia 352)

(References: Arcana Coelestia 3527)

7781. 'And all the firstborn of the beasts' means adulterated forms of the good of faith. This is clear from the meaning of 'the firstborn' as faith; and from the meaning of 'beast' as affections for good, and in the contrary sense affections for evil, dealt with in 45, 46, 141, 143, 246, 714, 715, 719, 776, 2179, 2180, 3519, 4724, 5198. Such things come to be meant by 'beasts' from representatives in the next life, 3218; and for that reason also such things were meant by the ones used in sacrifices, 2180, 2805, 2807, 2870, 3519. And because 'beasts' meant these things 'the firstborn of the beasts' therefore means the good of truth, at this point when it had been adulterated since it was with the Egyptians, who perverted all truths and forms of good by applying them to evil purposes.