What is the ruling on prayers and fasts missed out of ignorance by a duty-bound person, male or female, in their early years of takleef (religious obligation), and the exact number of which is not known? Is there an expiation to be offered?
It is obligatory to make up missed prayers and fasts, and it is permissible to make up the least possible number they are certain to have missed. As for fasting, in addition to making up the fasts, one must offer an expiation for knowingly breaking the fast (feeding sixty poor believers for each day missed) and another expiation for delaying the makeup fast (feeding one poor believer for each day missed), unless they were certain that fasting was not obligatory upon them.