'Mighty' in the Bible

There have been mighty kings also over Jerusalem, who have ruled over all the country beyond the River; and tribute, custom, and toll, was paid unto them.

and hath extended lovingkindness unto me before the king, and his counsellors, and before all the king's mighty princes. And I was strengthened according to the hand of Jehovah my God upon me, and I gathered together out of Israel chief men to go up with me.