Sa'id bin Abi Maryam سعيد بن أبي مريم · General Behavior (Kitab Al-Adab)

Everything of a Muslim is sacred to a Muslim : his property, honour and blood. It is enough evil for any man to despise his brother Muslim.

Zayd ibn Wahb said: A man was brought to Ibn Mas'ud. He was told: This is so and so, and wine was dropping from his beard. Abdullah thereupon said: We have been prohibited to seek out (faults). If anything becomes manifest to us, we shall seize it.

The Prophet (May peace be upon him) cursed effeminate men (mukhannathan) and women who imitated men, saying: Put them out of your houses, and put so-and-so out. (that is to say, the effeminate men)

A man asked the Messenger of Allah (May peace be upon him): When aspect of Islam is best? He replied: that you should provide food and greet both those you know and those you do not know.