Hammad said: If a woman experiencing istihada (non-menstrual bleeding) does not pray for several months due to ignorance, then she must make up all those missed prayers. It was asked: How will she make them up? He said: If she has the strength, she should make up all the missed prayers in a single day. Imam Darimi, may Allah have mercy on him, was asked: Do you also say this? He replied: «أي والله» (Yes, by Allah, I also say this).