23 He said, “Come what may, I want to run.” So Joab said, “Run!” Then Ahimaaz ran by way of the plaina and outran the Cushite.

Read 2 Samuel 18:23 Using Other Translations

But howsoever, said he, let me run. And he said unto him, Run. Then Ahimaaz ran by the way of the plain, and overran Cushi.
"Come what may," he said, "I will run." So he said to him, "Run." Then Ahimaaz ran by the way of the plain, and outran the Cushite.
“Yes, but let me go anyway,” he begged. Joab finally said, “All right, go ahead.” So Ahimaaz took the less demanding route by way of the plain and ran to Mahanaim ahead of the Ethiopian.