Keluaran 7:7

7:7 Now Moses was eighty years old and Aaron was eighty-three years old when they spoke to Pharaoh.

Keluaran 15:20

15:20 Miriam the prophetess, the sister of Aaron, took a hand-drum in her hand, and all the women went out after her with hand-drums and with dances. ¹ 

[15:20]  ¹ sn See J. N. Easton, “Dancing in the Old Testament,” ExpTim 86 (1975): 136-40.