what message did Okonkwo give to his sons and daughters after Nwoye left the family?

He told the boys that if they were going to be weak and follow Nwoye, they needed to do it while he lived, that if they were to turn against him after he died....... he'd come back from the dead and break their necks.

Okonkwo asked that his daughters not marry until they returned to Umuofia.