Ahimaaz son of Zadok, however, persisted and said to Joab, "Regardless of whatever may happen, please let me also run behind the Cushite!" "My son," Joab replied, "why do you want to run, since you will not receive a reward?"

2 Samuel 18:21
So Joab said to a Cushite, "Go, tell the king what you have seen." The Cushite bowed to Joab and took off running.

2 Samuel 18:23
"No matter what, I want to run!" he replied. "Then run!" Joab told him. So Ahimaaz ran by way of the plain and outran the Cushite.

2 Samuel 18:29
The king asked, "Is the young man Absalom all right?" And Ahimaaz replied, "When Joab sent the king's servant and your servant, I saw a great tumult, but I do not know what it was."

Then said Ahimaaz the son of Zadok yet again to Joab, But howsoever, let me, I pray you, also run after Cushi. And Joab said, Why will you run, my son, seeing that you have no tidings ready?