Then the king summoned Saul’s servant Ziba and said to him, “I have given to your master’s grandson all that belonged to Saul and to all his house.
The matter is here settled concerning Mephibosheth. 1. This grant of his father's estate is confirmed to him, and Ziba called to be a witness to it (Sa2 9:9); and, it should seem, Saul had a very good estate, for his father was a mighty man of substance (Sa1 9:1), and he had fields and vineyards to bestow, Sa1 22:7.
Commenting on 2 Samuel 9:9-13
Then the king called to Ziba, Saul's servant,.... Who had been his servant: and said unto him, I have given unto thy master's son; meaning either, as some, the son of Mephibosheth, Micha after mentioned; or rather Mephibosheth himself, the grandson of Saul, whose servant Ziba had been: all that pertained to Saul, and to all his house; all his paternal estate, or what he...
I have given unto thy master's son - Unless Ziba had been servant of Jonathan, this seems to refer to Micha, son of Mephibosheth, and so some understand it; but it is more likely that Mephibosheth is meant, who is called son of Saul instead of grandson.