Reference: Siyar A’laam an-Nubalaa v4 p606
said:
Muhammad ibn Seereen would fast every other day.
Abu 'Abdullaah
Graduate of the Islaamic University of Madeenah, having completed the Arabic Language programme at the Institute of Arabic Language before progressing to the Faculty of Sharee'ah, from which he graduated in 2004. He currently resides in Birmingham, UK.