Exodus 15:20

ותקח מרים הנביאה AND MIRIAM THE PROPHETESS TOOK — But where had she prophesied? When she was THE SISTER OF AARON alone — before Moses was born she said, “My mother will at some time bear a son who will deliver Israel etc.”, as is stated in Treatise Sotah 12b (cf. Megillah 14a). Another explanation of אחות אהרן, the sister of Aaron: because he jeopardised his life for her by entreating on her behalf and so possibly incurring God’s displeasure when she was stricken with leprosy, she is called by his name (Mekhilta; cf. Rashi Genesis 34:25). את התף A TIMBREL — an instrument for a particular kind of music. בתפים ובמחלת WITH TIMBRELS AND WITH DANCES — The righteous women in that generation were confident that God would perform miracles for them and they accordingly had brought timbrels with them from Egypt (Mekhilta).

וַתִּקַּח֩ מִרְיָ֨ם הַנְּבִיאָ֜ה אֲח֧וֹת אַהֲרֹ֛ן אֶת־הַתֹּ֖ף בְּיָדָ֑הּ וַתֵּצֶ֤אןָ כׇֽל־הַנָּשִׁים֙ אַחֲרֶ֔יהָ בְּתֻפִּ֖ים וּבִמְחֹלֹֽת׃

And Miryam the prophetess, the sister of Aharon, took a timbrel in her hand; and all the women went out after her with timbrels and with dances.