דברי הימים א, פרק י״א, פסוק כ׳

David's military forces were anchored by extraordinary warriors, each recognized for their legendary feats and specific ranks. Within this elite group, Abshai—also known from the Book of Samuel as Abishai—holds a unique command position. Noticeably absent from this roster of heroes is his brother, Joab. This omission is intentional; because Joab served as the supreme commander of the entire army, it would have been disrespectful to his high rank to list him simply alongside the rest of the warriors [רש״י].

Abshai is recognized as the commander [ביאור שטיינזלץ] of a daring trio of fighters who famously broke through the Philistine camp to draw water [רש״י, מצודת דוד]. During combat, he would wave his spear [ביאור שטיינזלץ] and charge the enemy with a sudden burst of renewed energy, fighting as fiercely as if the battle had only just begun [מצודת דוד].

His prestige was undeniable, earning him profound respect even among the first and most senior trio of David's men. The primary approach among commentators is that his incredible ability to strike down three hundred enemies naturally elevated him to their supreme rank [מצודת דוד, מלבי״ם]. Taking a slightly different approach to his legendary status, another perspective emphasizes his unparalleled individual power, suggesting his fame spread because his personal strength alone was equal to the combined might of all the other warriors put together [רש״י].