‏الصلاة : Hadeeth No:1115 Mu'aiqib said: They asked the Prophet (sallAllaahu alayhi wa sallam) about the removal of (pebbles) in prayer, whereupon he said: If you do it, do it only once....

‏البيوع : Hadeeth No:3801 Abu Huraira (Allaah be pleased with him) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: Do not withhold excess of water, so that you may prevent the growth of herbage....