diff --git a/23-ISA/19.usfm b/23-ISA/19.usfm
index cf3ef622..1d87d404 100644
--- a/23-ISA/19.usfm
+++ b/23-ISA/19.usfm
@@ -65,7 +65,7 @@
 
 \s5
 \v 18 In that day there will be five cities in the land of Egypt that speak the language of Canaan and swear allegiance to Yahweh of hosts. One of these cities will be called The City of the Sun.
-\f + \ft Instead of \fqa The City of the Sun \fqb , some ancient and modern versions have \fqa The City of Destruction \fqb . \f*
+\f + \ft Instead of \fqa The City of the Sun \fqb , which probably refers to the Egyptian city of Heliopolis, some ancient and modern versions have \fqa The City of Destruction \fqb . \f*
 
 \s5
 \p