Narrated `Aisha: The Prophet entered upon me while there was a curtain having pictures (of animals) in the house. His face got red with anger, and then he got hold of the curtain and tore it into pieces. The Prophet said, "Such people as paint these pictures will receive the severest punishment on the Day of Resurrection ."

Narrated Abu Mas`ud: A man came to the Prophet and said "I keep away from the morning prayer only because such and such person prolongs the prayer when he leads us in it. The narrator added: I had never seen Allah's Apostle more furious in giving advice than he was on that day. He said, "O people! There are some among you who make others dislike good deeds) cause the others to have aversion (to congregational prayers). Beware! Whoever among you leads the people in prayer should not prolong it, because among them there are the sick, the old, and the needy." (See Hadith No. 670, Vol 1)

Narrated `Abdullah bin `Umar: While the Prophet was praying, he saw sputum (on the wall) of the mosque, in the direction of the Qibla, and so he scraped it off with his hand, and the sign of disgust (was apparent from his face) and then said, "Whenever anyone of you is in prayer, he should not spit in front of him (in prayer) because Allah is in front of him."

Narrated Zaid bin Khalid Al-Juhani: A man asked Allah's Apostle about "Al-Luqata" (a lost fallen purse or a thing picked up by somebody). The Prophet said, "You should announce it publicly for one year, and then remember and recognize the tying material of its container, and then you can spend it. If its owner came to you, then you should pay him its equivalent." The man said, "O Allah's Apostle! What about a lost sheep?" The Prophet said, "Take it because it is for you, for your brother, or for the wolf." The man again said, "O Allah's Apostle! What about a lost camel?" Allah's Apostle became very angry and furious and his cheeks became red (or his face became red), and he said, "You have nothing to do with it (the camel) for it has its food and its water container with it till it meets its owner."

Narrated Zaid bin Thabit: Allah's Apostle made a small room (with a palm leaf mat). Allah's Apostle came out (of his house) and prayed in it. Some men came and joined him in his prayer. Then again the next night they came for the prayer, but Allah's Apostle delayed and did not come out to them. So they raised their voices and knocked the door with small stones (to draw his attention). He came out to them in a state of anger, saying, "You are still insisting (on your deed, i.e. Tarawih prayer in the mosque) that I thought that this prayer (Tarawih) might become obligatory on you. So you people, offer this prayer at your homes, for the best prayer of a person is the one which he offers at home, except the compulsory (congregational) prayer."