The rule for Fasting is similar to Namaz and is Farz-e-Ain and those who reject to believe it as obligatory (Farz) is a Kafir and those who miss it without genuine reason is a big sinner and will receive punishment in hell. Those children who have the strength should be made to keep a fast and strong boys and girls should be forced to keep a fast (a few slaps not with a stick) [Durr-e-Mukhtar]. Fasting for the whole month of Ramadan is obligatory. Obligation of Fasting
The rule for Fasting is similar to Namaz and is Farz-e-Ain and those who reject to believe it as obligatory (Farz) is a Kafir and those who miss it without genuine reason is a big sinner and will receive punishment in hell. Those children who have the strength should be made to keep a fast and strong boys and girls should be forced to keep a fast (a few slaps not with a stick) [Durr-e-Mukhtar]. Fasting for the whole month of Ramadan is obligatory. 