Avestan

Script developed in Sasanian Persia (5th–7th century) to transcribe the Avesta, the Zoroastrian holy scriptures. Avestan is an ancient Iranian language from ~1500–500 BC containing the Gathas — hymns composed by Zarathustra (Zoroaster) himself as divine revelations. Zoroastrianism, the world's first revealed religion, influenced the theology of Judaism, Christianity, and Islam. Still used in religious ceremonies by Parsi communities in Iran and India.