‏الصلاة : Hadeeth No:1114 Mu'aiqib quoted the Prophet of Allaah (sallAllaahu alayhi wa sallam) mentioning the removal of pebbles from the ground where he prostrated himself. He (the Prophet) said: It you must do so, do it only once....

‏الزهد والرقائق‏ : Hadeeth No:7072 It is reported on the authority of Amir b. Sa'd that Sa'd b. Abi Waqqas was in the fold of his camels that his son 'Umar came to him. When Sa'd saw him he said: I seek refuge with Allaah from the mischief of this rider. And as he got down he said to him: You are busy with your camels and your sheep ...