'Mighty men' in the Bible

After him repaired Nehemiah the son of Azbuk, the ruler of half the district of Beth-zur, unto the place over against the sepulchres of David, and unto the pool that was made, and unto the house of the mighty men.

and their brethren, mighty men of valor, a hundred twenty and eight; and their overseer was Zabdiel, the son of Haggedolim.