The king may not judge nor be judged. He may not testify nor be testified against. He does not perform chalitzah, nor is chalitzah performed with his wife. He does not perform yibum, nor is yibum performed with his wife. R’ Yehudah says: If he wishes to perform chalitzah or yibum, the is remembered favorably. They said to him: They do not listen to him. No one may marry his widow. R’ Yehudah says: A king may marry the widow of [another] king, as we find that David married the widow of Saul, as it is stated: And I gave you the house of your master and the wives of your master in your bosom.