Any Muslim can influence his Qareen to embrace Islam, but it is not always likely to be the case, for it applies exclusively to Prophet Muhammad SAW who was protected by Allah against any evil intention from the devil. Therefore, whoever claims that the matter applies to all people must provide evidence from the Quraan or the Sunnah to support his claim.
It is true that the Muslim might weaken his Qareen by the intensity of the remembrance of Allah, by the pratice of all acts of worhsip. and by the recitation of the Quraan, as understood in this hadeeth, narrated by Abu Hurayra. The Prophet SAW said, "The believer controls his Qareen the way you control your mount in your journeys.". Accodring to al-Haytham, this hadeeth was narrated by Ahamad. and the authority includes Ibn Lahi'ah (known for his weak narrations). The narration also includes Musa ibn Rawdan, whi is not reliable/.
