Abu Sulayman (al-Khattabi) (may Allah have mercy on him) said: "Nushrah is a type of ruqyah and treatment by which a person is treated who is thought to be touched by the jinn (possessed). It is said that it is called nushrah because by it (the healer) unties (the illness) from him, that is, he removes from him the illness that has permeated him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / Q19613
Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) says that the Messenger of Allah (peace and blessings be upon him) was asked about nushrah (ruqyah for jinn possession), and he (peace and blessings be upon him) said: "It is the work of Satan."
The Shaykh said: The two kinds of opinion reported about nushrah are the same as those about ruqyah in general.
It has also been narrated from the Prophet (peace and blessings be upon him) as mursal, and despite being mursal it is more correct.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19613