'Fit' in the Bible

All these were the sons of Jediael, by the heads of their fathers, mighty men of valour, seventeen thousand two hundred, fit for service for war.

All these were the sons of Asher, heads of fathers' houses, choice men, mighty of valour, chiefs of the princes. And their number according to their genealogy, registered as fit for service for war, was twenty-six thousand men.

And of the Gadites, there separated themselves to David in the stronghold in the wilderness mighty men of valour, men fit for the service of war, armed with shield and spear; whose faces were like the faces of lions, and who were swift as the gazelles upon the mountains:

Behold, it is given to the fire for fuel: the fire consumeth both the ends of it, and the midst of it is burned; is it fit for any work?