Exodus 15:5

Overview - Exodus 15
1	The song of Moses, Miriam, and Israel on their deliverance.
22	The people want water in the wilderness.
23	The waters at Marah are bitter, they murmur, Moses prays, and sweetens the waters by God's direction.
27	They encamp at Elim, where are twelve wells, and seventy palm trees.

Exodus 15:5  (King James Version)
The depths have covered them: they sank into the bottom as a stone.