"I asked Anas bin Malik: 'How were the sandals of the Messenger of Allah (ﷺ) ? He said: 'They had two straps.'"
Jami` at-Tirmidhi Book 24, Hadith 60
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Jami` at-Tirmidhi Book 24, Hadith 59 Next Hadith → From Anas: "The sandals of the Prophet (ﷺ) had two straps."

This Hadith is Hasan Sahih.

He said: There are narrations on this topic from Ibn 'Abbas, and Abu Hurairah.

Jami` at-Tirmidhi Book 24, Hadith 61