It is narrated from the Mother of the Believers Sayyidah Aishah (may Allah be pleased with her) that "The Prophet (peace and blessings be upon him) used to pray on a mat."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated it from Hisham except Hammad bin Mas'adah (may Allah have mercy on him), whereas the well-known narration is that of Hammad bin Salamah (may Allah have mercy on him), which he narrates from al-Azraq bin Qays (may Allah have mercy on him)."
Hadith Referenceالمعجم الأوسط / باب الألف / 2075
Hadith Takhrij«أخرجه الطبراني فى «الأوسط» برقم: 7179»