Exodus 15:1

Amplified Bible

15 Then Moses and the children of Israel sang this ^[a]song to the Lord, singing,

“I will sing to the Lord, for He has triumphed gloriously;
The horse and its rider He has thrown into the sea.

Exodus 15:1 It was natural enough to create and sing a song of celebration to the Lord at this point, but the song, with all its detail, undoubtedly served as a memory device as well, a way to embed the account of the miracle in the minds of the people of Israel.