And David said to him, “Do not fear, for I will show you kindness for the sake of your father Jonathan, and I will restore to you all the land of Saul your father, and you shall eat at my table always.”
Here is, I. David's enquiry after the remains of the ruined house of Saul, Sa2 9:1. This was a great while after his accession to the throne, for it should seem that Mephibosheth, who was but five years old when Saul died, had now a son born, Sa2 9:12. David had too long forgotten his obligations to Jonathan, but now, at length, they are brought to his mind.
Commenting on 2 Samuel 9:1-8
And David said unto him, fear not,.... He might observe a dejection in his countenance, a trembling in his limbs, and might discover signs of fear lest David should cut him off, because he was of the seed royal: for I will surely show thee kindness for Jonathan thy father's sake; whom he loved as his own soul, and to whom he had sworn that...
Will restore thee all the land - I believe this means the mere family estate of the house of Kish, which David as king might have retained, but which most certainly belonged, according to the Israelitish law, to the descendants of the family.