Matthew Henry Presbyterian @wholebiblehenry

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

John Gill Reformed Baptist @doctorgill

Then King David sent,.... Messengers; it may be Ziba, none being more proper than he that knew him, and where he was: and fetched him out of the house of Machir, the son of Ammiel, from Lodebar; they demanded him in the king's name, and being delivered to them, they brought him from thence to Jerusalem.

Geneva Bible Notes Reformed @genevanotes

Then king David sent, and fetched him out of the house of Machir, the son of Ammiel, from Lodebar. (c) Who was also called Eliam the father of Bathsheba, David's wife.