Narrated Abu Hurairah:
That the Messenger of Allah (ﷺ) said, I was shown the first of (every) three to enter Paradise: A martyr, an 'Atif, who is a Muta'affif, and a slave who perfected his worship of Allah, and was sincere to his masters.
[Abu 'Eisa said:] This Hadith is Hasan.