Narrated Tamim ad-Dari: Tamim asked: Messenger of Allah), what is the sunnah about a man who accepts Islam by advice and persuasion of a Muslim? He replied: He is the nearest to him in life and in death.
Related hadith on this topic
Explanation & Benefits
Maulana Ataullah Sajid
Benefits and Issues:
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This is also a form of wala’ (loyalty) that a non-Muslim accepts Islam at the hands of a Muslim.
The other relatives of this new Muslim, being non-Muslim, cannot be his heirs; therefore, the one who brought him to Islam will be his heir.
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If the new Muslim has other Muslim heirs, then they will inherit his estate. However, if those heirs are entitled to fixed shares (ashab al-furud) and he has no Muslim agnatic (asaba) relatives, then the one who brought him to Islam will become his agnatic heir and inherit from him.
And Allah knows best.
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 2752