Modesty

The Prophet Muhammad (Peace be upon him) said,

"Faith (Belief) consists of more than sixty branches (i.e. parts). And Haya (Modesty) is a part of faith."

[Sahih al Bukari: Vol 1:#8]

and

"Modesty and inability to speak are two branches of faith, but obscenity and eloquence are two branches of hypocrisy."

[Mishkat: 4796]