Sunan Abi Dawud 4134
سنن أبي داود#4134SahihNarrated Anas:The sandals of the Prophet (ﷺ) had two thongs
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 (5857)
In-book reference: 34:115