Joshua 4:6-7
6 so that this will be a sign among you. In the future, when your children ask you, ‘What do these stones mean to you?’(A)
7 you should tell them, ‘The waters of the Jordan were cut off in front of the ark of the Lord’s covenant. When it crossed the Jordan, the Jordan’s waters were cut off.’ Therefore these stones will always be a memorial for the Israelites.”(B)