Anas bin Malik reported,

We consider that this verse was revealed concerning Anas bin Nadr, "Among the believers are men who have been true to what they pledged to Allah" [Ahzab 33:23].

Bukhari 4783

Sahih

حدثني محمد بن بشار حدثنا محمد بن عبد الله الأنصاري قال حدثني أبي عن ثمامة

عن أنس بن مالك رضي الله عنه قال

نرى هذه الآية نزلت في أنس بن النضر {من المؤمنين رجال صدقوا ما عاهدوا الله عليه}

البخاري 4783صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Tafsir
Chapter
Of them, some have fulfilled their vow and some are still waiting, and they have not altered in the least
Numbering
Darussalam 4783
Bukhari 4783