Joshua 4:6 in the World English Bible
that this may be a sign among you, that when your children ask in the future, saying, ‘What do you mean by these stones?’
Context
5 And Joshua said unto them, Pass over before the ark of the LORD your God into the midst of Jordan, and take ye up every man of you a stone upon his shoulder, according unto the number of the tribes of the children of Israel:
6 That this may be a sign among you, that when your children ask their fathers in time to come, saying, What mean ye by these stones?
7 Then ye shall answer them, That the waters of Jordan were cut off before the ark of the covenant of the LORD; when it passed over Jordan, the waters of Jordan were cut off: and these stones shall be for a memorial unto the children of Israel for ever.