Tamim ad-Dari said he asked God’s Messenger what the sunna was about a polytheist who accepts Islam by the advice and persuasion of a Muslim, and he replied that he was the nearest to him in life and in death. Tirmidhi, Ibn Majah and Darimi transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الفرائض والوصايا / 3064
Hadith Gradingالألبانی:لم تتمّ دراسته | زبیر علی زئی:حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «حسن، رواه الترمذي (2112) و ابن ماجه (2752) والدارمي (377/2 ح 3037)»