Know, may God support us and you with a spirit from Him, that all of what we have mentioned in these chapters and what is included in each case of them, which we have not mentioned for fear of lengthening, is obligatory for a person to purify his interior and heart from it according to the doctrine of the people of God and his elite among the people of revelation. There is no disagreement among the people of taste in that, but he needs The person who purifies himself from most of them has abundant knowledge of the method of purification from what we have mentioned, and some of them may be purification of others. Then we return to our purpose in mentioning the legitimate rulings regarding this purification, which is washing with water, and its internal considerations and rulings. So I say, we have mentioned in ablution for whom purification is obligatory and when it is obligatory, so we do not need to discuss it. Mention what the two purities have in common.