Sunan Abi Dawud 4795
سنن أبي داود#4795SahihAbd Allah b. ‘Umar said:The Prophet (ﷺ) passed by a man of the Ansar when he was giving his brother a warning against modesty. The Apostle of Allah (ﷺ) said : Leave him alone, for modesty is a part of faith
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (24) Sahih Muslim (36)
In-book reference: 43:23