Rudrāyaṇa avadāna

Rudrāyaṇa-avadāna - a story from the Divyavadana (Divine Stories), an anthology of Buddhist tales, that explains how the Buddha gave the first illustration of the Bhavacakra to King Rudrayaṇa.

According to this story, at the time of the Buddha, King Rudrayana (a.k.a King Udayana) offered a gift of a jeweled robe to King Bimbisara of Magadha. King Bimbisara was concerned that he did not have anything of equivalent value to offer as a gift in return. Bimbisara went to the Buddha for advice, and the Buddha gave instructions to have the first drawing of the Bhavacakra made, and he told Bimbisara to send the drawing to Rudrayana. It is said that Rudrayana attained realization through studying this drawing.