He was doubly honored above the Three, and he became their commander, even though he was not included among the Three.

2 Samuel 23:18
Now Abishai, the brother of Joab and son of Zeruiah, was chief of the Three, and he lifted his spear against three hundred men, killed them, and won a name along with the Three.

1 Chronicles 11:20
Now Abishai, the brother of Joab, was chief of the Three, and he lifted his spear against three hundred men, killed them, and won a name along with the Three.

1 Chronicles 11:22
And Benaiah son of Jehoiada was a man of valor from Kabzeel, a man of many exploits. He struck down two champions of Moab, and on a snowy day he went down into a pit and killed a lion.

Of the three, he was more honorable than the two; for he was their captain: however, he attained not to the first three.