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Imam Sadeq (PBUH) says:
The servant’s faith does not complete until it is four qualities, his creation improves and he dirty himself …
Man’s faith will not be complete unless there are four traits in him: 1. His morality is good. 2. His breath is soft and acceptable. 3. 4.
Amali Sheikh Tusi, page 125
islamquotes.org
NOTE: Translated with Google Translate