It is narrated from Sayyiduna Fayruz al-Daylami (may Allah be pleased with him) that the delegation of Thaqif came to the Messenger of Allah (peace and blessings be upon him), and they said: "We saw him (peace and blessings be upon him) praying in sandals that had two straps (facing each other)."
No one narrated this hadith from Abd al-Malik bin Umayr (may Allah have mercy on him) except Hammad bin Salamah (may Allah have mercy on him), and this report is narrated from Sayyiduna Fayruz al-Daylami (may Allah be pleased with him) only with this chain.