Keep mosques clean and free from sputum; Show respect for places of worship; Be mindful towards one's actions while praying

This hadith emphasizes the importance of keeping mosques clean and free from sputum. The Prophet Muhammad was very angry when he saw sputum on the wall facing the Qibla in a mosque. He showed his disapproval by scratching it off with his hand. He then instructed that if anyone needs to spit during prayer, they should do so to their left side instead of inside a mosque. This hadith teaches us that we should always keep our mosques clean and respect them as places of worship by not expectorating or spitting inside them during prayer time. We should also be mindful of our actions in general when we are in a place of worship as it is important to show respect for such places.