Jonathan—had a son that was lame— This account of Mephibosheth is properly inserted here; for, as the murderers of Ish-bosheth wished to destroy the whole house of Saul, in order to ingratiate themselves with David, the flight of Mephibotheth is designedly mentioned to inform the reader, that he was not put to death with Ish-bosheth, because, after the slaughter of Saul and Jonathan, he was carried away, and did not dwell in the house with Ish-bosheth.
Related Commentaries of 2 Samuel 4:4
2 Samuel 4:4
4 And Jonathan, Saul's son, had a son that was lame of his feet. He was five years old when the tidings came of Saul and Jonathan out of Jezreel, and his nurse took him up, and fled: and it came to pass, as she made haste to flee, that he fell, and became lame. And his name was Mephibosheth.b