What did the Prophet Muhammad (saw) do when he saw sputum stuck to the Qibla of the mosque?
 Abu Sa'id al-Khudri reported:                      The Apostle of Allah (may peace be upon him) saw sputum sticking to the Qibla of the mosque. He scratched it off with a pebble and then forbade spitting on the right side or in front, but (it is permissible) to spit on the left side or under the left foot.