English: “And He responded to him” — it should have said “to them.” Rather, this is because the prayer of a righteous person who is the child of a righteous person is not comparable to the prayer of a righteous person who is the child of a wicked person.
On the daf / in context: The singular “to him” teaches the superior efficacy of the prayer of a tzaddik who is the son of a tzaddik over that of a tzaddik who is the son of a rasha.
Type of Learning
Custom (Bavli — prayer of tzaddik ben tzaddik vs. tzaddik ben rasha)
What Is Learned
The prayer of a righteous person who is himself the child of a righteous person is more effective than that of a righteous person whose parent was wicked; the singular “to him” records this distinction.