It is narrated from Abu Ja'far Qari that I saw Sayyiduna Abdullah bin Umar (may Allah be pleased with them) when he would bow down to prostrate, he would lightly remove the pebbles from his place of prostration.

It is narrated from Yahya bin Saeed that it reached him that Sayyiduna Abu Dharr (may Allah be pleased with him) used to say: Removing the pebbles once is permissible, and not removing them is better than red camels.