Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates regarding the Noble Prophet (peace and blessings be upon him): About a place where filth, etc., is thrown, the Noble Prophet (peace and blessings be upon him) said: "When that place has been watered three times (i.e., washed), you may perform prayer there."
Hadith Referenceسنن الدارقطني / كتاب الحيض / 880
Hadith Takhrij«أخرجه ابن ماجه فى ((سننه)) برقم: 744، والدارقطني فى ((سننه)) برقم: 880، 881، والطبراني فى ((الأوسط)) برقم: 1181»