The Ahadith of Nabi (Sallallahu Alaihi Wasallam) emphasise the importance of modesty. Modesty is an adornment for a believer and fortification of Iman. It is the platform from which many other noble traits are developed. If this trait is nurtured, it develops and beautifies the character of the person.
When a person becomes accustomed to sin, it is a sign that modesty and shame have left that person.
Hazrat Abu Hurayrah (R) narrates that Rasulullah (Sallallahu Alaihi Wasallam) said, “Iman has more than 70 branches; the most sublime of all is the Kalimah La Ilaha Illallah … and the lowest branch of Iman is to remove a harmful object from the path. And Haya (modesty and shame) is an integral branch of Iman. (Sahih Muslim)
Hazrat Abu Masood (R) narrates that Nabi (Sallallahu Alaihi Wasallam) said, “One of the advices that the people learnt from the previous messengers is, “If you have no Haya (shame, modesty), do (you will eventually end up doing) whatever you wish.” (Sahih Bukhari, Abu Dawood )
Hazrat Imran bin Husayn (R) narrates that Rasulullah (Sallallahu Alaihi Wasallam) said, “Haya (modesty/shame) is only good.” (Abu Dawood)