Commentators explain that Joab's question to Ahimaaz is rooted in practical, fatherly concern. When Joab says Ahimaaz will have "no reward for the tidings," he means that since another messenger was already sent, Ahimaaz would not receive the customary payment or honor. Scholars note that Joab, calling him "my son," was likely trying to spare the young man a difficult and ultimately profitless journey.