NET
6 David said, “Whoever attacks the Jebusites first will become commanding general!” So Joab son of Zeruiah attacked first and became commander.
Darby
6 And David said, Whoever smites the Jebusites first shall be chief and captain. And Joab the son of Zeruiah went first up, and was chief.
KJV
6 And David said, Whosoever smiteth the Jebusites first shall be chief and captain. So Joab the son of Zeruiah went first up, and was chief.