Musannaf Ibn Abi Shaybah

Hazrat Ibn Sirin says that praying on a carpet is an innovation (bid'ah).

Hazrat Saeed bin Musayyib says that praying on a carpet is an innovation (bid'ah).

Hazrat Jabir bin Zaid considered it undesirable to pray on anything made from the hair of animals, etc., and regarded it as preferable to pray on anything made from plants, etc.

Hazrat Abu Ubaidah narrates that Hazrat Abdullah used to pray only on the ground and would prostrate only on the ground.

Hazrat Mujahid says that there is no harm in prostrating on the earth or on things made from the earth.

Hazrat Abu Bakr considered it undesirable to perform prayer on the cushion placed under the saddle of a mount.

Hazrat Hisham states that my father considered it undesirable to perform prayer anywhere other than on the ground.