This mention of Mephibosheth seems to be inserted here partly to show that with the death of Ish-bosheth the cause of the house of Saul became hopeless, and partly to prepare the way for the subsequent mention of him 2 Samuel 9:1-13; 2 Samuel 16:1-4; 2 Samuel 19:25.

He fell, and became lame - Dislocated his ankle, knee, or thigh; which was never after reduced; and thus he became lame. Lovely Jonathan! unfortunate in thy life, and in thy progeny.

And Jonathan, Saul's son,.... His eldest son, who died at the same time with him:

had a son that was lame of his feet; of both feet, which were broken or bruised by a fall, as later related: and

he was five years old when the tidings came of Saul and Jonathan out of Jezreel: that is, when the tidings of their death came from Jezreel, the place where the battle was fought in which they died, to Gibeah, and the royal palace there; so that he was now twelve years of age:

and his nurse took him up and fled; fearing the Philistines would come thither and destroy the family of Saul; and this child being the son of Jonathan, the eldest son of Saul, was by birth heir to the crown, his father and grandfather being both dead, and which might make the nurse the more solicitous to save his life by flight:

and it came to pass, as she made haste to flee, that he fell, and became lame; in her hurry and fright he dropped out of her arms, and had some bone broken or dislocated, which was never rightly replaced, or had some contusion, of which he was never cured:

and his name was Mephibosheth, called Meribbaal, 1 Chronicles 8:34; of the change of such names See Gill on 2 Samuel 2:8. This story of Mephibosheth, and of his nurse's flight with him, and what happened upon it, is here inserted on occasion of the flight of the Beerothites, 2 Samuel 4:3; but chiefly to observe in what condition Saul's family now was, and what encouraged the murderers of Ishbosheth to be guilty of the crime they were, since when he was taken off, there was none but this lame child of that family; and as the removal of Ishbosheth would be of so much service to David, they doubted not but it would be very acceptable to him, and they should be greatly rewarded and honoured; and which they might do with the greatest safety, since the nearest kinsman and avenger of blood was so young, and lame of both his feet: or rather this is mentioned to show that Ishbosheth had no right to the throne, his eldest brother's son being living; so that those murderers might think they did the right thing, to take away the life of an usurper.

Before the historian proceeds to describe what the two Beerothites did, he inserts a remark concerning Saul's family, to show at the outset, that with the death of Ishbosheth the government of this family necessarily became extinct, as the only remaining descendant was a perfectly helpless cripple. He was a son of Jonathan, smitten (i.e., lamed) in his feet. He was five years old when the tidings came from Jezreel of Saul and Jonathan, i.e., of their death. His nurse immediately took him and fled, and on their hasty flight he fell and became lame. His name was Mephibosheth (according to Simonis, for בשׁת מפאה, destroying the idol); but in 1 Chronicles 8:34 and 1 Chronicles 9:40 he is called Meribbaal (Baal's fighter), just as Ishbosheth is also called Eshbaal (see at 2 Samuel 2:8). On his future history, see 2 Samuel 9:1-13, 2 Samuel 16:1., and 2 Samuel 19:25.

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.

4:4 Jonathan had a son - This history is inserted as that which encouraged these men to this wicked murder, because Saul's family was now reduced to a low ebb; and if Isbosheth was dispatched, there would be none left, but a lame child, who was altogether unfit to manage the kingdom, and therefore the crown must necessarily come to David by their act and deed; for which they promised themselves no small recompense. Jezreel - The place of that last and fatal fight.

Mephibosheth: or, Meribbaal

4. Jonathan, Saul's son, had a son that was lame of his feet-This is mentioned as a reason why, according to Oriental notions, he was considered unfit for exercising the duties of sovereignty.

4:1-7 See how Ishbosheth was murdered! When those difficulties dispirit us, which should sharpen our endeavours, we betray both our heavenly crowns and our earthly lives. Love not sleep, lest thou come to poverty and ruin. The idle soul is an easy prey to the destroyer. We know not when and where death will meet us. When we lie down to sleep, we are not sure that we may not sleep the sleep of death before we awake; nor do we know from what hand the death-blow may come.