Chp. 14 verse 23 - Chp. 15 verse 5: The Egyptians pursue the poeple into the sea. Hashem commands Moshe to stretch forth his hand over the sea and the waters covered the Egyptians. Chp. ends with the famous phrase found in the daily morning prayer about faith in G-d and believing in Moshe His servant. Chp. 15, continues with the "awz yashir" the Jewish nation singing praise to G-d for saving them.