There is no problem in putting a picture on the article but do you have 1 A picture which clearly represents Muhammad in accordance to the textual descriptions of his physical appearance as well as his life and IF there is such picture available then 2 Is that Picture Credible and cited in any scholastic works Notably 3 If above two conditions are met AND the picture NOT titled as Muhammad but by the artists reference If above three conditions are true then I am right here to support the picture Otherwise please find out such picture and come back