They must have cooperated with their father. In time, they helped him build the ark, and then they went into it.
Ноагийн хөвгүүд Еховад захирагдах ёстойгоо ойлгож эцэгтэйгээ хамт хөвөгч авдар хийгээд тэндээ оржээ (Эх.