Obligatory duties are the deeds or omissions that God Almighty has made obligatory upon His servants and made obligatory upon them, and the sin of whoever does not perform them. They are of two types: an individual obligation, which is the one that is not waived if someone else does it, and a sufficiency obligation, which is the one that is waived if someone else does it, and it was before someone else did it. It is obligatory on him and on others, such as prayer for the funeral, washing the dead, and jihad, and then there is another obligation that appears between them that has a side to each of them that contradicts the rule of the other, such as the obligatory Hajj if he is unable, and if he is not asked to do it except with the ability, then it is an obligation that depends on its condition, so if his guardian performs Hajj on his behalf, it is waived. On his behalf, he was rewarded with the reward for performance, and this is not in the obligation of sufficiency due to the ex