Muwatta 847

Malik was asked about a man who became Muslim on the last day of Ramadan: must he make up the whole of Ramadan, or only the day on which he became Muslim? He said: he does not make up what has passed; he begins fasting from now on, though it is more beloved to him that he make up the day he became Muslim at some point. The editor notes that Abu Musab and Suwayd transmitted this ruling from Malik in different wordings (826). ¹

Belongs to the Muwatta, Book of Fasting. Source: the Muwatta. Mentions Malik ibn Anas. Built on in the chapters on making up fasts (qada al-sawm).