Jami` at-Tirmidhi 2112
جامع الترمذي#2112SahihAbudullah bin Mawhab - and some of them said- 'Abdullah bin Wahb, narrated from Tamim Ad-Dari who said:'I asked the Messenger of Allah(S.A.W): What is the Sunnah regarding a man among the people of the Shirk who accepts Islam at the hand of a man among the Muslims?' So the Messenger of Allah(S.A.W) said: "He is the closet of the people to him in his life and in his death
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan Sahih
Al-AlbaniHasan Sahih
Zubair Ali ZaiHasan
In-book reference: 29:23