Numbers 33:8
“And they departed from before Pi–hahiroth, and passed through the midst of the sea into the wilderness, and went three days’ journey in the wilderness of Etham, and pitched in Marah.”
And they departed from Succoth, and pitched in Etham, which is in the edge of the wilderness.
And they removed from Etham, and turned again unto Pi–hahiroth, which is before Baal–zephon: and they pitched before Migdol.
And they departed from before Pi–hahiroth, and passed through the midst of the sea into the wilderness, and went three days’ journey in the wilderness of Etham, and pitched in Marah.
And they removed from Marah, and came unto Elim: and in Elim were twelve fountains of water, and threescore and ten palm trees; and they pitched there.
And they removed from Elim, and encamped by the Red sea.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.”
“And the children of Israel went into the midst of the sea upon the dry ground: and the waters were a wall unto them on their right hand, and on their left.”
“And they removed from Etham, and turned again unto Pi–hahiroth, which is before Baal–zephon: and they pitched before Migdol.”
“And Moses stretched out his hand over the sea; and the Lord caused the sea to go back by a strong east wind all that night, and made the sea dry land, and the waters were divided.”
“So Moses brought Israel from the Red sea, and they went out into the wilderness of Shur; and they went three days in the wilderness, and found no water.”