If the Eid is a sermon after the prayer, and the purpose of the sermon is to remind the people and teach them while they are not staying, but most of them dispose of it by completing the prayer, then the sermon about raining water after the prayer is better, because they do not leave until the imam asks for rain with them, because they went out to pray for rain, and the sermon only takes place after the prayer and after praying for rain, so he does not leave. people, so the purpose of the sermon will be achieved