Perhaps because he was determined to make up for having walked out on them, perhaps because Harry’s descent into listlessness galvanized his dormant leadership qualities, Ron was the one now encouraging and exhorting the other two into action.
There are no more uses of "exhort" in the book.
Show samples from other sources
I have exhorted and encouraged her, but it has to be her decision.
The organization exhorts people to be environmentally conscious.