when any of you prays and takes off his sandals, he should not harm anyone by them. He should place them between his feet or pray with them on
Sunan Abi Dawud Book 2, Hadith 265
← Previous Hadith The Prophet (ﷺ) said: When any of you prays, he should not place his sandals on his right side or on his left so as to be on the right side of someone else, unless no one is at his left, but should place them between his feet.

Sunan Abi Dawud Book 2, Hadith 264 Next Hadith → the Messenger of Allah (ﷺ) used to pray while. I was by his side in the state of menstruation. Sometime his cloth would touch me when he prostrated. He would pray on a small mat.

Sunan Abi Dawud Book 2, Hadith 266