Translation:

50. And remember We divided the sea for you and saved you and drowned Pharaoh's people within your very sight.

Notes (Tafseer)

65. When the Israelites at last escaped from Egypt, they were pursued by Pharaoh and his host. By a miracle the Israelites crossed the Red Sea, but the host of Pharaoh was drowned: Exod. xiv. 5-31.