When is the imam's supplication in the second form of the prayer for rain?

Question:
He says: Honorable Shaykh, may Allah grant you success. We understood from the lesson on the second form of the prayer for rain that the imam supplicates twice: once alone, and once with the people, each person individually. It is reported that 'Umar brought forward al-Abbas, who then supplicated with the people. Likewise, he brought forward Mu'awiyah al-Aswad al-Jarshi. When was this supplication made? And is it prescribed to do this if one suspects a person's righteousness?

Answer:
The prayer. This supplication is after the prayer. 'Umar prayed with them, then he ordered al-Abbas to supplicate. Likewise, Mu'awiyah (may Allah be pleased with him), when he prayed with them, ordered Abu Yazid to supplicate to Allah after the prayer, because the kinship of the Messenger (peace and blessings be upon him) is more hopeful for the acceptance of the supplication. And likewise, the people of righteousness are more hopeful for the acceptance of their supplication. Yes.