All praise is due to Allah, and may peace and blessings be upon the Messenger of Allah.
First: The Jinn Are Accountable for Faith and Worship
The jinn are required to worship Allah, the Exalted, and are addressed by the message of the messengers. Among them are believers and disbelievers. Allah, the Exalted, says:
“And I did not create the jinn and mankind except to worship Me.” [Adh-Dhariyat: 56].
Allah also says about a group of jinn:
“Indeed, we have heard an amazing Quran. It guides to the right course, and we have believed in it, and we will never associate anyone with our Lord.” [Al-Jinn: 1–2].
Second: Can a Person’s Qareen Become Muslim?
It is authentically reported that the Prophet ﷺ said:
“There is none among you except that a companion from among the jinn has been assigned to him.” They asked, “Even you, O Messenger of Allah?” He replied: “Even me, except that Allah has helped me against him.” Narrated by Muslim (2814).
Some narrations of this hadith contain the wording “fa-aslama”, with a fatḥah on the letter meem, meaning that the companion became Muslim and would only command the Prophet ﷺ to do good.
However, scholars have differed over the pronunciation and meaning of this word. Some understood it to mean that the companion embraced Islam, while others understood it to mean that the Prophet ﷺ was protected from his companion’s evil and whispers.
According to the interpretation that the companion became Muslim, this was a special blessing that Allah granted to His Prophet ﷺ. There is no definitive evidence establishing that the companions of other people can become Muslim or that this has actually happened.
Third: What Should a Muslim Do Regarding His Qareen?
A Muslim should remain cautious of Satan’s whispers throughout life, seek refuge in Allah from him, and maintain prayer, remembrance of Allah, and Quran recitation. One should not become preoccupied with trying to communicate with the Qareen or investigating whether it has embraced Islam.
Conclusion: The possibility that the Prophet’s ﷺ Qareen became Muslim is one interpretation of the hadith, and scholars have differed regarding its meaning. As for the Qareens of ordinary people, there is no explicit evidence establishing that they become Muslim. Therefore, it is not appropriate to state with certainty that this can happen or that it has actually happened.
And Allah knows best.