It means that if you dream of a white elephant in a river, it indicates that you have been promoted.
Others say that dreaming of elephants indicates success, gaining great fame, riding elephants to improve social status, and dreaming of angry elephants coming towards them. Only by perseverance can they get rich. Only by concentrating on business can they make a lot of money. They dream that elephants will soon overcome difficulties and win.
I don't know which one your dream belongs to. ...
This is for your reference.