How to make up prayers and fasts
Question
A person owes fard fasts, that is, from the time he reached puberty he did not keep the fard fasts: he did not keep them for several years in a row, and now, six or seven years after reaching puberty, he has begun to keep them. What will be the procedure for keeping these fard fasts, and from what age will it be fard upon him to make up the fard prayers and fard fasts?
Answer
Both fasting and prayer become fard upon reaching puberty. So, reckoning from the very time he reached puberty, he should make up six prayers for each day, that is, the five fard prayers and, sixth, the witr prayer; and from that same time he should keep the fasts of every Ramadan, and in the fast he should specify the Ramadan: “I am keeping the fasts of the first Ramadan…
Source: Fatawa Mahmudiyya
Preview. The full text opens with JavaScript enabled.