Reference: Siyar A’laam an-Nubalaa v10 p257
said:
Other than al-Qa’nabee رحمه الله, I have not seen anyone who by the mere sight of them they would evoke others to remember Allaah تعالى.
If he were to pass by a gathering [of people] they would say:
[لا إله إلا الله].And it was said that he was called a monk due to his worship and excellence.
