John Chrysostom
What follows next? Mephibosheth is deceitfully killed, undoubtedly, perhaps by Jehovesh. Refer to 2 Samuel 4:7. David mourned for him profoundly, to the extent that he executed those responsible for his death.
How much more now when wicked men have slain an innocent man in his own house, upon his bed, shall I not require his blood at your hand, and take you away from the earth?
אַ֞ף כִּֽי־אֲנָשִׁ֣ים רְשָׁעִ֗ים הָרְג֧וּ אֶת־אִישׁ־צַדִּ֛יק בְּבֵית֖וֹ עַל־מִשְׁכָּב֑וֹ וְעַתָּ֗ה הֲל֨וֹא אֲבַקֵּ֤שׁ אֶת־דָּמוֹ֙ מִיֶּדְכֶ֔ם וּבִעַרְתִּ֥י אֶתְכֶ֖ם מִן־הָאָֽרֶץ׃
2 Church Fathers comment on this verse
What follows next? Mephibosheth is deceitfully killed, undoubtedly, perhaps by Jehovesh. Refer to 2 Samuel 4:7. David mourned for him profoundly, to the extent that he executed those responsible for his death.
Rehoboam and Baanah, the sons of Remmon the Beerothite, murdered Ishbosheth, the son of Saul, through deceit. When they brought the news to David and presented him with the head of the foe, David ordered their execution, declaring that wicked men have killed an innocent person in his own home, while he lay in his bed. Jehoshaphat, though not a perfectly righteous individual, is referred to as innocent due to the unjust manner of his death.
Passages read together with this verse.