'Mighty men' in the Bible

After him repaired Nehemiah the son of Azbuk, the ruler of the half district of Beth-zur, unto the place opposite the sepulchers of David, and to the pool that was man 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.