Jami` at-Tirmidhi 3679
جامع الترمذي#3679SahihNarrated 'Aishah:that Abu Bakr entered upon the Messenger of Allah (ﷺ), so he said: "You are Allah's 'Atiq from the Fire." From that day on he was called 'Atiq
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
Zubair Ali ZaiSahih
In-book reference: 49:75