Anas bin Malik reported,

Anas said, "My uncle, after whom I was named, was not present with the Messenger of Allah ﷺ at Badr, and this weighed heavily upon him. He said, 'I was absent from the first battle the Messenger of Allah ﷺ fought. If Allah grants me another battle alongside the Messenger of Allah ﷺ, Allah will surely see what I do.' He was wary of saying anything beyond that.Then he was present with the Messenger of Allah ﷺ on the day of Uhud. He met Saad bin Muaz coming toward him, and Anas said to him, 'Abu Amr, where are you headed?'He replied, 'How wonderful, the fragrance of Paradise! I can sense it here, this side of Uhud.'So he fought them until he was killed. Some eighty-odd wounds were found on his body, between sword blows, spear thrusts, and arrow shots. My aunt Rabi bint Nadr, his sister, said, 'I could only recognize my brother by his fingertips.'And this verse was revealed, "Men who were true to the covenant they made with Allah. Some of them have fulfilled their pledge with their lives, and some are still waiting, and they have not changed in the least" [Ahzab 33:23]. They used to consider that it was revealed concerning him and his companions."

Azami 8094

Sahih

عن أنس قال

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 عهدوا الله عليه فمنهم من قضى نحبه ومنهم من ينتظر وما بدلوا تبديلا} [الأحزاب: ٢٣] قال: فكانوا يرون أنها نزلت فيه وفي أصحابه.

الأعظمي 8094صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Jihad
Chapter
Martyrs and the rulings on martyrdom
Section
Martyr is in Paradise
Numbering
Jami al-Kamil 8094 (2nd edition)