Salim reported on the authority of his father that the Prophet (may peace and blessings be upon him) heard a man censuring his brother regarding modesty. Upon this the Prophet remarked:Modesty is part of Iman (faith)

Zuhri has narrated this hadith with the addition of these words:He (the Holy Prophet) happened to pass by a mass of Ansar who was instructing his brother (about modesty)