Jami` at-Tirmidhi 3506
جامع الترمذي#3506SahihAbu Hurairah [may Allah be pleased with him] narrated the the Prophet said:“Indeed Allah has ninety-nine Names, one hundred less one, whoever counts them shall enter Paradise.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiHasan
In-book reference: 48:137