Rashi on Tanakh2 Samuel 9

I have given to the son of your master. The king is permitted to transfer an estate¹From its previous rightful owner to another person of his choice. This is Rebbe Yosi’s view in Sanhedrin 20b that those royal powers spoken of in Shmuel are to be taken literally as belonging to the king and not just a means of frightening the people into respecting the king which is Rebbe Yehudi’s view there in Sanhedrin, (See also Tosfos, ibid). as it is said (Shmuel I, 8:14) Within the jurisdiction of the monarchy is [the power] to take their fields and their vineyards and to give it to his servants.

So will your servant do. Mephivoshes will eat at my table. Tsivoh said, "So will your servant do." And Dovid responded, "Mephivoshes will eat at my table."²The verse contains the words of two separate speakers, Tzivoh is speaking in the first part of the verse and Dovid responds in the second part.

Those who dwelled in the house of Tsivoh. His children and his slaves.³Mentioned in verse 10.