By the rivers of Babylon, there we sat down
Ye-eah we wept, when we remembered Zion
By the rivers of Babylon, there we sat down
Ye-eah we wept, when we remembered Zion

When the wicked
Carried us away in captivity
Required from us a song
Now how shall we sing the lord's song in a strange land

When the wicked
Carried us away in captivity
Requiring of us a song
Now how shall we sing the lord's song in a strange land

Let the words of our mouths and the meditations of our hearts
Be acceptable in thy sight here tonight
Let the words of our mouths and the meditation of our hearts
Be acceptable in thy sight here tonight

By the rivers of Babylon, there we sat down
Ye-eah we wept, when we remembered Zion
By the rivers of Babylon, there we sat down
Ye-eah we wept, when we remembered Zion

Zion (Hebrew: צִיּוֹן, tziyyon; Tiberian vocalization: tsiyyôn; transliterated Zion or Sion) is a term that most often designates the Land of Israel and its capital, Jerusalem. The word is found in texts dating back almost three millennia. It commonly referred to a specific mountain near Jerusalem (Mount Zion), on which stood a Jebusite fortress of the same name that was conquered by David and was named the City of David.

The term Zion came to designate the area of Jerusalem where the fortress stood, and later became a metonym for Solomon's Temple in Jerusalem, the city of Jerusalem and the entire Promised Land to come, in which, according to the Hebrew Bible, God dwells among his chosen people.

source:
http://en.wikipedia.org/wiki/Zion