It is only in late Zoroastrian works that we find faint hints of anthropomorphic representation. In fact only a single Iranian goddess – the goddess Anahita – is depicted anthropomorphically. All the other deities of the ancient Iranian religion are represented abstractly, only through their “hypostases” or incarnations (chiefly as certain birds or beasts). The Yasna Haptanhaiti – one of the oldest parts of the Avesta, the ancient Iranian sacred text – mentions the worship of mythical creatures such as, for example, the sacred three-legged ass Khara and a few others, but the deities of the ancient Iranians were not pictorially represented.