Sayyiduna Abdullah bin Umar (may Allah be pleased with him) narrates: I used to spend the night in the mosque of the Prophet (peace and blessings of Allah be upon him). I was a young, unmarried man. Dogs used to come and go in the mosque and urinate, and nothing was sprinkled over their urine. (Imam Ibn Hibban, may Allah have mercy on him, says:) The statement of Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that dogs used to urinate means that they did so outside the mosque and then would come and go in the mosque, but due to their coming and going, no water was sprinkled in the mosque.