From Sahih Bukhari (Hadith 3812):
Narrated Sa`d bin Abi Waqqas:I have never heard the Prophet (ﷺ) saying about anybody walking on the earth that he is from the people of Paradise except `Abdullah bin Salam. The following Verse was revealed concerning him: "And a witness from the children of Israel testifies that this Qur'an is true
Reference: Bukhari 3812