The mosque of the statement of knowledge and its virtue is a book on the virtue of knowledge and its request, composed by Al -Hafiz Ibn Abd al -Barr, the author mentions the meaning of knowledge and the preference of his request and the pursuit of it and its care for it, and the corruption of the saying in the religion of God without knowledge, and the prohibition of judgment without argument or evidence, and Ibn Abd al -Barr also spoke On the etiquette of learning and what the world and the learner need to create and persevere in it