Joshua 4:20
“And those twelve stones, which they took out of Jordan, did Joshua pitch in Gilgal.”
And it came to pass, when the priests that bare the ark of the covenant of the Lord were come up out of the midst of Jordan, and the soles of the priests’ feet were lifted up unto the dry land, that the waters of Jordan returned unto their place, and flowed over all his banks, as they did before.
And the people came up out of Jordan on the tenth day of the first month, and encamped in Gilgal, in the east border of Jericho.
And those twelve stones, which they took out of Jordan, did Joshua pitch in Gilgal.
And he spake unto the children of Israel, saying, When your children shall ask their fathers in time to come, saying, What mean these stones?
Then ye shall let your children know, saying, Israel came over this Jordan on dry land.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Then Samuel took a stone, and set it between Mizpeh and Shen, and called the name of it Eben–ezer, saying, Hitherto hath the Lord helped us.”
“And the children of Israel did so as Joshua commanded, and took up twelve stones out of the midst of Jordan, as the Lord spake unto Joshua, according to the number of the tribes of the children of Israel, and carried them over with them unto the place where they lodged, and laid them down there.”
“And command ye them, saying, Take you hence out of the midst of Jordan, out of the place where the priests’ feet stood firm, twelve stones, and ye shall carry them over with you, and leave them in the lodging place, where ye shall lodge this night.”
“But he himself turned again from the quarries that were by Gilgal, and said, I have a secret errand unto thee, O king: who said, Keep silence. And all that stood by him went out from him.”
“And it shall be for a sign and for a witness unto the Lord of hosts in the land of Egypt: for they shall cry unto the Lord because of the oppressors, and he shall send them a saviour, and a great one, and he shall deliver them.”