Joshua 4:21 in the World English Bible
He spoke to the children of Israel, saying, “When your children ask their fathers in time to come, saying, ‘What do these stones mean?’
Context
20 And those twelve stones, which they took out of Jordan, did Joshua pitch in Gilgal.
21 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?
22 Then ye shall let your children know, saying, Israel came over this Jordan on dry land.