[2] 'Whoring' is spoken of frequently in the Word. An unlawful joining to truth is meant by this, and an unlawful joining to good by 'committing adultery', so that 'whoring' means the falsification of truth, and 'committing adultery' the adulteration of good. The falsification of truth takes place in the following three ways, 1 If a person leads an evil life while acknowledging truths received through religious teachings, for the truths then have evil inside them, and evil falsifies truth. It does so because evil dispels from truths what is heavenly and Divine, and introduces what is hellish, as a consequence of which falsification takes place.

[3] 2 If a person first accepts the truths in religious teachings and afterwards assents to the falsity of another set of teachings, which happens solely in the case of those who lead an evil life, because evil has an appetite for falsity and freely takes hold of it as the truth. 3 If a person who is leading an evil life and adopting falsities as his religious teachings takes hold of truths belonging to another set of teachings, he too falsifies truths, because he does not acknowledge truths for their own sake, only for the sake of earning some gain, important position, or reputation.

[4] In the Word all these kinds of falsification are called acts of whoredom and prostitution, because a lawful joining together, which is that of goodness and truth, is meant by a marriage, see 2727-2759, so that instances of an unlawful joining together are meant by acts of whoredom. The truth of this may be recognized from a large number of places in the Word, of which let just these two be brought forward here: In Ezekiel,

O Jerusalem, you committed whoredom because of your renown, and poured out your acts of whoredom on every passer-by. You took some of your garments and made for yourself high places variously coloured, and on them committed whoredom. For your adornment you took vessels made of My gold and of My silver, which I had given you, and made for yourself figures of the male, and committed whoredom with them. You took your sons and your daughters, whom you had borne to Me, and sacrificed them to them. Were your acts of whoredom a small matter? You committed whoredom with the sons of Egypt, your neighbours, great in flesh, and multiplied your whoredom to provoke Me to anger. You committed whoredom with the sons of Asshur, and you committed whoredom with them and were not satisfied. And you multiplied your whoredom, even as far as the trading land of Chaldea. Ezek 16:15-17,20,26,28,29

And in the same prophet,

Two women, the daughters of one mother, committed whoredom in Egypt. In their youth they committed whoredom. Oholah is Samaria, and Oholibah is Jerusalem. Oholah committed whoredom under Me and doted on her lovers, on the Assyrians her neighbours. She bestowed her acts of whoredom on them. Her acts of whoredom brought from Egypt she did not give up, for they had lain with her in her youth. Oholibah corrupted her love more than she, and multiplied her acts of whoredom above her sister's acts of whoredom; she doted on the sons of Asshur. She added to her acts of whoredom and saw the images of the Chaldeans. As soon as her eyes saw them she desired them. The sons of Babel came to her, into her love-bed. Ezek 23:2-5,7,8,11,12,14,16

Further examples of the same thing occur in many other places, which may be seen, together with explanations of them as well as of the two quoted here, in 2466, 8904.