Kamasutra 5.5.27

5.5.27

praṇidhinā cāyatim asyāḥ saṃdūṣya rājani vidviṣṭa iti kalatrāvagrahopāyenainām antaḥpuraṃ praveśayed iti pracchannayogāḥ/ ete rājaputreṣu prāyeṇa//

Thus end the means of gaining over the wives of others secretly.

(7) Lastly, if the woman desired by the King be living with some person who is not her husband, then the King should cause her to be arrested, and having made her a slave, on account of her crime, should place her in the harem. Or the King should cause his ambassador to quarrel with the husband of the woman desired by him, and should then imprison her as the wife of an enemy of the King, and by this means should place her in the harem.

The above mentioned ways of gaining over the wives of other men are chiefly practiced in the palaces of Kings. But a King should never enter the abode of another person, for Abhira the King of the Kottas was killed by a washerman while in the house of another, and in the same way Jayasana the King of the Kashis was slain by the commandment of his cavalry.