Clarity of understanding in the virtue of prayer and peace upon the best of people, one of the works of Imam Ibn Qayyim al-Jawziyyah, and it is a distinguished book, which he wrote on an important topic for every Muslim, which is the virtue of prayer and peace upon our Prophet, peace and blessings be upon him, and the rulings and etiquette related to it. It is one of the most important and valuable books that It was composed in this field, as he refined it, arranged it, and divided it, so that he succeeded and did well.