Reference: Muhaddith al-‘Asr Muhammad Naasiruddeen al-Albaanee – Page 39
Sameer ibn Ameen az-Zuhayree narrates:
From the day I knew him, he was known to fast on Mondays and Thursdays – [and] this was throughout the entire year, unless he was travelling or ill [and this was the case even before I knew him].
