Psalm 137: Israelites were in Babylon as captives (as foreigners). Yet, they were captivated by their love for Zion (Jerusalem).

Psalm 137 -(v9) The Israelites had suffered a lot, including the infants, they were dashed against the rocks to death.
-This is still happening even today in modern Babylon by ISIS, Christians are getting persecuted.
-Are we giving thanks to the Lord for having given us the sophisticated and peaceful life and the beautiful place to worship the Lord?