Qarin (plural: qurana') refers to the constant companion or spiritual counterpart assigned to every human being from birth until death. The term most commonly refers to the jinn companion who accompanies each person, whispering temptations and encouraging evil, as mentioned in the Quran: "And whoever is blinded from remembrance of the Most Merciful-We appoint for him a devil (shaytan), and he is to him a companion" (43:36). The Prophet Muhammad (peace be upon him) confirmed that every person has a qarin from the jinn, and he had one who submitted to Islam and only encouraged good. This exception demonstrates that qarin, like other jinn, possess free will and can be Muslim or disbelieving. The qarin's constant presence explains the internal struggle against evil inclinations-the whispers (waswasa) that prompt sinful thoughts and actions. Resisting these promptings through remembrance of Allah, seeking refuge, and strengthening faith forms part of the spiritual struggle (jihad al-nafs). The qarin differs from the recording angels (Raqib and Atid), who simply document deeds, and from the guardian angels who protect believers. Scholars debate whether the qarin is identical to the devil (shaytan) assigned to each person or a distinct entity. Regardless, the concept reminds Muslims of the constant spiritual battle requiring vigilance, reliance on Allah, and the power of seeking divine protection. The Prophet taught specific prayers for refuge from the qarin's evil, particularly in times of anger or temptation. Understanding the qarin encourages believers to take responsibility for their choices rather than blaming the companion-it whispers, but humans choose to act.