Please explain these for me.

Please explain these for me.’ The Imam (MGB) said, ‘The obligatory fasts are the fasting for the month of Ramazan; and fasting for two consecutive months as a compensation for intentionally breaking one’s fast during the month of Ramazan; fasting for two consecutive months as a compensation of unintentionally killing a believer in case one cannot find a slave to free.

As the Honorable the Exalted God says, ‘Never should a believer kill a believer; but (If it so happens) by mistake, (Compensation is due): If one (so) kills a believer, it is ordained that he should free a believing slave, and pay compensation to the deceased's family, unless they remit it freely. If the deceased belonged to a people at war with you, and he was a believer, the freeing of a believing slave (Is enough).

If he belonged to a people with whom ye have treaty of Mutual alliance, compensation should be paid to his family, and a believing slave be freed. For those who find this beyond their means, (is الفضيل بن يسار قال: سمعت أبا جعفر عليه السلام يقول: من شرب الخمر فسكر منها لم تقبل صلاته أربعين يوما، فان ترك الصلاة في هذه الايام ضوعف عليه العذاب لترك الصلاة، وفي خبر آخر إن شارب الخمر توقف صلاته بين السماء والارض، فاذا تاب ردت عليه.

قلت: فسرهن لي جعلت فداك، قال: أما الواجب فصيام شهر رمضان، وصيام شهرين متتابعين لمن أفطر يوما من شهر رمضان متعمدا، وصيام شهرين متتابعين في قتل الخطأ لمن لم يجد العتق واجب.