Mythology, which plays a vital role in poetry, is cited in research on the sources of Divan poetry.\rIt may be claimed that the mythological elements used by poets in Divan literature are usually drawn from\rthe circle of Islamic culture for aesthetic reasons. Different mythical aspects, as well as numerous people,\rcosmic elements, animals, plants, and objects addressed in the poems, may be included in divan poetry. As a\rresult, the complexity and depth of divan poetry may be appreciated by looking at and researching the aspects\rfound in the poems from this perspective. Mythological animals such as Hüma, Phoenix, Simurg and eagle\rare incorporated in Divan poetry to generate associations in the reader's mind, nourish the poem, give it\rdepth, richness, and polysemy, and boost aesthetic pleasure. Bebr, from which the bebr-i beyân, which is the\rsubject of the study, is manufactured, draws attention as one of them. Bebr, a predatory beast/animal with\rscaly skin and the speed of a lion, is similar to a huge cat-like tiger. The lion is afraid of the bloodshed bebr.\rIt is said to have been found in India and Africa. Bebr, which attacks its enemies fiercely, becomes\rfrightening with the feathers on its body when it jumps on its prey. That is why being proud of one's power is\rreferred to as \"expanding one's feathers\" in our language. It does not burn in fire and does not sink in water\rby nature. It is believed that no weapons of war affect his hide/skin. When the bebr was cornered during the\rreign of Nûşirevân, they dispatched a thousand horsemen to slay it. In the Damascus mountains, Rustem, one\rof the Shahnameh's heroes, killed him. Another term for bebr, whose skin is made of armor, is bebr-i beyân.\rIt's a type of leather armor Rustem wears during the war to keep him safe from arrows and other weapons.\rDuring the war, he wore a bebr-i beyân garment as armor.