Thabit reported,

Anas said, "My uncle, after whom I was named, did not take part in Badr alongside the Messenger of Allah ﷺ, and that weighed heavily on him. He said, 'The very first battle the Messenger of Allah ﷺ fought, I missed. If Allah grants me the chance to be present at another battle with the Messenger of Allah ﷺ, Allah will surely see what I do.' He was hesitant to say more than that.He took part with the Messenger of Allah ﷺ on the day of Uhud. He met Saad bin Muaz, and Anas said to him, 'Abu Amr, where are you headed?'He replied, 'How wonderful is the fragrance of Paradise! I can smell it coming from beyond Uhud.'He fought them until he was killed. More than eighty wounds were found on his body, between sword strikes, spear thrusts, and arrow shots."His sister, my aunt Rabi bint Nadr, said, "I could not recognize my brother except by his fingertips."Then this verse was revealed, "Some men who were true to the covenant they made with Allah. Among them is he who has fulfilled his vow, and among them is he who awaits, and they have not changed in the least" [Ahzab 33:23].They used to consider that this verse was revealed concerning him and his companions.

Muslim 4918

Sahih

و حدثني محمد بن حاتم حدثنا بهز حدثنا سليمان بن المغيرة

عن ثابت قال

قال أنس عمي الذي سميت به لم يشهد مع رسول الله ﷺ بدرا قال فشق عليه قال أول مشهد شهده رسول الله ﷺ غيبت عنه وإن أراني الله مشهدا فيما بعد مع رسول الله ﷺ ليراني الله ما أصنع قال فهاب أن يقول غيرها قال فشهد مع رسول الله ﷺ يوم أحد قال فاستقبل سعد بن معاذ فقال له أنس يا أبا عمرو أين فقال واها لريح الجنة أجده دون أحد قال فقاتلهم حتى قتل قال فوجد في جسده بضع وثمانون من بين ضربة وطعنة ورمية قال فقالت أخته عمتي الربيع بنت النضر فما عرفت أخي إلا ببنانه ونزلت هذه الآية {رجال صدقوا ما عاهدوا الله عليه فمنهم من قضى نحبه ومنهم من ينتظر وما بدلوا تبديلا} قال فكانوا يرون أنها نزلت فيه وفي أصحابه

مسلم 4918صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Leadership
Chapter
Certainty of Paradise for the martyr
Numbering
Darussalam 4918
Muslim 4918