Талмуд к Хорайот 2:8

MISHNAH: The king does not judge⁶⁶In the theory of the Yerushalmi this is biblical law, even though historically the administration of justice was the hallmark of kingship. Historically, the explanation of the Babli (19a) has much to recommend it, that the Mishnaic theory of kingship, positing total separation of the executive from the judiciary, is a reaction to the misrule of the later Hasmoneans and the Herodians., nor may one judge him;⁶⁷This would be too dangerous for judges and witnesses. he does not testify, nor may one testify against him; he does not give ḥalîṣah, nor does one give ḥalîṣah to his wife⁶⁸The ceremony would not be consistent with the dignity of his office/. He does not marry in levirate, nor may one marry his wife in levirate. Rebbi Jehudah says, if he wants to give ḥalîṣah or marry in levirate, let his good deeds be remembered. They told him, even if he wants to, one does not listen to him⁶⁹The king is obliged to sustain his dignity.. One may not marry his widow; Rebbi Jehudah says, a king may marry a king’s widow⁷⁰This seems to have been Solomon’s interpretation when he ordered Adoniah killed for asking Avishag’s hand (1K. 2:22)., since we find that David married Saul’s widow, as it is said⁷¹2S. 12:8.: I gave your master’s house to you and your master’s wives on your breast.