diff --git a/source/_docs/configuration/templating.markdown b/source/_docs/configuration/templating.markdown
index 871f7d22927..6175a146fc6 100644
--- a/source/_docs/configuration/templating.markdown
+++ b/source/_docs/configuration/templating.markdown
@@ -743,6 +743,9 @@ Some examples:
 
 ### Regular expressions
 
+For more information on regular expressions
+See: [Python regular expression operations](https://docs.python.org/3/library/re.html)
+
 - Test `string is match(find, ignorecase=False)` will match the find expression at the beginning of the string using regex.
 - Test `string is search(find, ignorecase=False)` will match the find expression anywhere in the string using regex.
 - Filter `string|regex_replace(find='', replace='', ignorecase=False)` will replace the find expression with the replace string using regex.