The freed slaves are led by God to the Red Sea, and Pharaoh comes back after them with chariots and his entire army.
God saves His people with the miraculous parting of the sea, and the Israelites walk across; when the army of Egypt follows, the waters come back down upon them and they are destroyed.
The people sing the Song of Moses at this wondrous escape from certain death, but soon after are kvetching about not having meat or water or bread.
God answers their complaints, but it doesn’t seem to appease their ingratitude or faithlessness.
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