'Alone' in the Bible

I sat not in the assembly of them that make merry, nor rejoiced; I sat alone because of thy hand; for thou hast filled me with indignation.

when the king of Babylon's army was fighting against Jerusalem, and against all the cities of Judah that were left, against Lachish and against Azekah; for these alone remained of the cities of Judah as fortified cities.

Arise, get you up unto a nation that is at ease, that dwelleth without care, saith Jehovah; that have neither gates nor bars, that dwell alone.