Is the prayer of a madman answered?

There is no evidence in the Sunnah that the prayer of an insane person is answered, and it is not permissible to claim that without proof. This claim may arise from the extremism of some Sufis or common folk. The prayer of an insane person is uttered without comprehension or knowledge; he babbles words whose meaning he does not grasp, and it does not contain the meaning of supplication, which is an act of worship that requires apprehending the meanings of divinity and demonstrating one's neediness before Allah. However, some insane individuals may distinguish between those who treat them kindly and those who harm them, and they might supplicate for those who honor them or against those who mistreat them. It is not far-fetched that their supplication might then be answered, especially if they are oppressed. As for the absolute statement that the prayer of an insane person is answered, there is no evidence for it; rather, it is a statement about Allah made without knowledge.