פירוש על שמואל ב 10:2

As his father acted with kindness towards me. And what was the kindness? When Dovid was fleeing because of Shaul, his father, mother and brothers came to [join] him. "Dovid led them before the king of Moav"¹Shmuel I, 22:4. [Dovid] said to him, "Please, [let] my father and mother dwell with you." [The king of Moav] killed them [all] except for one of them [i.e., the brothers] who fled and escaped to the land of the people of Amon, to Nochosh. This is a Midrash Rebbe Tanchuma in [Parshas] Vayeiroh ailov.