Dweller among the people; or to whom the people turn, the Hachmonite (1 Chr. 11:11), one of David’s chief heroes who joined him at Ziklag (12:6). He was the first of the three who broke through the host of the Philistines to fetch water to David from the well of Bethlehem (2 Sam. 23:13-17). He is also called Adino the Eznite (8).
Jashobeam
Three hundred men struck down at one time by a single soldier’s spear: that is the deed credited to Jashobeam. First Chronicles lists him at the head of David’s mighty men and calls him “the chief of the captains.” The parallel list in 2 Samuel tells a similar story, though the name and the number there are different. A Jashobeam is also named among the Korhites in another roll in Chronicles. The verses give his rank and one remembered act, and little else, as lists of the brave often do.
3 verses
2 Samuel
These be the names of the mighty men whom David had: The Tachmonite that sat in the seat, chief among the captains; the same was Adino the Eznite: he lift up his spear against eight hundred, whom he slew at one time.
1 Chronicles
And this is the number of the mighty men whom David had; Jashobeam, an Hachmonite, the chief of the captains: he lifted up his spear against three hundred slain by him at one time.
Elkanah, and Jesiah, and Azareel, and Joezer, and Jashobeam, the Korhites,
From Easton's Bible Dictionary
Matthew George Easton, 1897