The Holy Imam devoted himself to prayers in such abundance, that all the limbs employed in prostration bore scars and impressions of his Sajdah (prostration).

Most of the nights were spent on the prayer-carpet. The sense of his absorption and humiliation in prayers to Allah were in such earnest that he would shed tears profusely out of fear of Allah. While performing ablution, he trembled with the fear of Allah and his face grew pale at the time of prayers. His earnest meditation in the offering of prayers and his extreme absorption in communion with Allah would render him entirely unconscious of his environments.

Source: en.shafaqna.com