2:8 Now Abner son of Ner, the general in command of Saul’s army, had taken Saul’s son Ish-bosheth and had brought him to Mahanaim.
9:9 Then the king summoned Ziba, Saul’s attendant, and said to him, “Everything that belonged to Saul and to his entire house I hereby give to your master’s grandson.
21:7 The king had mercy on Mephibosheth son of Jonathan, the son of Saul, in light of the Lord’s oath that had been taken between David and Jonathan son of Saul.