Q 1: What
is the ruling on talking at great length to one of the Jinn (creatures created from fire) if
he talks through the tongue of a possessed person? Is it authentically proven that the Prophet (peace be upon him) or one of the Sahabah (Companions of the Prophet) spoke extensively with one of the Jinn, or asked about his name, religion, country and who sent him? What is the evidence that the voice heard through the tongue of the possessed person is that of the Jinn? Kindly provide us with the legal opinion supported with the relevant proofs.
It often happens that the Qarin (a personal Jinn companion for humans) speaks when a Ruqyah (reciting Qur'an and supplications over the sick as a cure) is recited over the possessed. Thereupon, this Jinn should be threatened with the torment of Allah and warned against harming the Muslim. Shaykh-ul-Islam
Ibn Taymiyyah (may Allah be merciful to him) said something similar in a treatise entitled "Explaining the evidence on the generality of (Part No. 1; Page No. 102) the message." You should read it, because it will be very beneficial regarding the issue in question. However, you should not talk at great length with the Jinni unless necessity so demands.