What is the ruling on one who deliberately had intercourse with his wife during the daytime in Ramadan while fasting, knowing that he was not praying at that time, and has since separated from this wife? And what is the ruling on the money he took from illicit relationships, whether with the girls' consent or by deception? And how can one expiate these major sins after repentance, regret, and abstinence from disobedience?

Scholars have differed regarding declaring someone who abandons prayer out of negligence to be a disbeliever (kafir). What the texts indicate is indeed declaring him a disbeliever. If someone's condition is such, then he must renew his faith and offer sincere repentance to Allah, and engage frequently in supererogatory acts of worship and obedience. He is not obligated to make up for missed prayers or fasts, and there is no expiation for him other than sincere repentance, remorse, and steadfastness. Nevertheless, making up for prayers and atoning for fasts as a precautionary measure would be safer.

Expiation for sins is achieved through sincere repentance, which Allah has legislated for His servants and by which He has promised the repentant mercy and forgiveness. The five conditions for repentance are: sincerity to Allah, abstaining from the sin, regretting having committed it, resolving not to return to it, and that repentance must occur before the death rattle. If the sin relates to the rights of people, then one must clear their liability by returning the rights to their owners or giving charity on their behalf if returning them is impossible. As for what was taken with their consent for an illicit purpose, one must dispose of it by any possible means.