Sahih al-Bukhari 362
صحيح البخاري#362SahihNarrated Sahl:The men used to pray with the Prophet (ﷺ) with their Izars tied around their necks as boys used to do; therefore the Prophet (ﷺ) told the women not to raise their heads till the men sat down straight (while praying)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 8:14