(1) When [Ish-bosheth] son of Saul heard that Abner had died in Hebron, he lost heart and all Israel was alarmed. (2) The son of Saul [had] two company commanders, one named Baanah and the other Rechab, sons of Rimmon the Beerothite—Benjaminites, since Beeroth too was considered part of Benjamin. (3) The Beerothites had fled to Gittaim, where they have sojourned to this day. ( (4) Jonathan son of Saul had a son whose feet were crippled. He was five years old when the news about Saul and Jonathan came from Jezreel, and his nurse picked him up and fled; but as she was fleeing in haste, he fell and was lamed. His name was Mephibosheth.) (5) Rechab and Baanah, sons of Rimmon the Beerothite, started out, and they reached the home of Ish-bosheth at the heat of the day, when he was taking his midday rest. (6) So they went inside the house, as though fetching wheat, and struck him in the belly. Rechab and his brother Baanah slipped by, (7) and entered the house while he was asleep on his bed in his bedchamber; and they stabbed him to death. They cut off his head and took his head and made their way all night through the Arabah. (8) They brought the head of Ish-bosheth to David in Hebron. “Here,” they said to the king, “is the head of your enemy, Ish-bosheth son of Saul, who sought your life. This day the LORD has avenged my lord the king upon Saul and his offspring.” (9) But David answered Rechab and his brother Baanah, the sons of Rimmon the Beerothite, and said to them, “As the LORD lives, who has rescued me from every trouble: (10) The man who told me in Ziklag that Saul was dead thought he was bringing good news. But instead of rewarding him for the news, I seized and killed him. (11) How much more, then, when wicked men have killed a blameless man in bed in his own house! I will certainly avenge his blood on you, and I will rid the earth of you.” (12) David gave orders to the young men, who killed them; they cut off their hands and feet and hung them up by the pool in Hebron. And they took the head of Ish-bosheth and buried it in the grave of Abner at Hebron.
Rav said: David accepted a slanderous report, as it is written with regard to David’s search for a surviving son of Jonathan: “And the king said to him, to Ziba, Saul’s slave: Where is he? And Ziba said to the king: Behold, he is in the house of Machir, the son of Ammiel, in Lo-Devar [belo devar]” (II Samuel 9:4). Ziba indicated to David that Jonathan’s son was inconsequential, lacking any matter [lo devar] of Torah. And it is written: “Then King David sent, and fetched him out of the house of Machir, the son of Ammiel, from Lo-Devar [milo devar]” (II Samuel 9:5). That verse can be read that after sending for him, David found him filled with matters [melo devar] of Torah. Now, after David saw that Ziba was a liar, when Ziba once again slandered Jonathan’s son, Mephibosheth, why did David accept his report? As it is written that when David fled from Absalom, he met Ziba: “And the king said: And where is your master’s son? And Ziba said to the king: Behold, he is staying in Jerusalem, as he said: Today shall the house of Israel restore to me the kingdom of my father” (II Samuel 16:3). And from where do we derive that David accepted Ziba’s slanderous report? As it is written: “Then said the king to Ziba: Behold, all that belongs to Mephibosheth is yours. And Ziba said: I humbly beseech you that I may find favor in your sight, my lord, O king” (II Samuel 16:4). And Shmuel said: David did not accept Ziba’s slanderous report without substantiation. Rather, he himself saw conspicuous matters in Mephibosheth that indicated that Ziba was right. As it is written: “And Mephibosheth, the son of Saul, came down to meet the king, and he had neither dressed his feet, nor trimmed his beard, nor washed his clothes from the day the king departed until the day he came back in peace” (II Samuel 19:25). David thought that he was mourning the fact that he had returned in peace. And it is written: “And it came to pass, when he came to Jerusalem to meet the king, and the king said to him: Why did you not go with me, Mephibosheth? And he answered: My lord, O king, my servant deceived me; for your servant said: I will saddle me a donkey, and I will ride on it, and go to the king; because lame isyour servant. And he slandered your servant to my lord the king; but my lord the king is like an angel of God: Do therefore what is good in your eyes” (II Samuel 19:26–28). “And the king said to him: Why do you speak any more of your matters? I have said: You and Ziba shall divide the estate. And Mephibosheth said to the king: Let him even take all, seeing that my lord the king is come back in peace to his own house” (II Samuel 19:30–31).
Mephibosheth said to David as follows: I had hoped for your return, saying: When will he come in peace, and yet you do this to me, giving Ziba half of my estate? It is not against you that I have grievances, but against He who brought you back in peace. Mephibosheth’s own statement substantiates Ziba’s report about him. This is what is written: “And the son of Jonathan was Meriv-Baal” (I Chronicles 8:34). The Gemara asks: And was Meriv-Baal his name? Wasn’t his name Mephibosheth? However, since he entered into a quarrel [meriva] with his Master [ba’al], i.e., God, and complained about God having saved David, a Divine Voice emerged and said to him: Quarrelsome one, the son of a quarrelsome one; you are just like your father, Saul. The Gemara explains: Quarrelsome one; that which we just said that Mephibosheth complained to God about His salvation of David. The son of a quarrelsome one; as it is written: “And Saul came to a city of Amalek and quarreled in the valley” (I Samuel 15:5). And Rabbi Mani said: Saul quarreled with God with regard to matters of the valley, saying: For the murder of even a single person, there is a commandment to break the neck of a heifer in a valley to atone for the crime (see Deuteronomy 21:1–9); why then must all these Amalekites be killed? To the matter at hand: Rav Yehuda said that Rav said: When David said to Mephibosheth: You and Ziba shall divide the estate, a Divine Voice emerged and said to him: Rehoboam and Jeroboam shall divide the kingdom. Rav Yehuda said that Rav said: Had David not accepted Ziba’s slanderous report about Mephibosheth, the kingdom of the house of David would not have been divided, Israel would not have worshipped idols because of Jeroboam, and we would not have been exiled from our land.
...therefore they called him Kilav in order to highlight that he was "Kulo Av"/entirely like his father, as if to say in all his images he was like his father, but Daniel was his real name