Of all the women in the Bible, Miriam is one of the only ones who is explicitly referred to as a prophetess. During the Passover story, directly after the Israelites have crossed the Red Sea, the text tells us: "Then Miriam the prophetess, Aaron's sister, took a timbrel in her hand, and all the women followed her, with timbrels dancing" (Exodus 15:20). Miriam then proceeds to sing a song of exhalation to the Lord, a poem that scholars today count as one of the oldest portions of text in the Bible.
Learn more about Miriam's life and her role in the Exodus story in: Who Was Miriam?
Image credit: "The Song of Miriam" by William Gale.