"Cautionary words" refer to advice or warnings given to someone in order to prevent them from making a mistake or facing a dangerous situation. Full definition
And before we get too carried away with everything mashable, it's worth recalling UX guru Jacob Nielsen's cautionary words of wisdom: «A snappy user experience beats a glamorous one». (elearningindustry.com)
Pannenberg does offer a much - needed cautionary word to those who may become too quickly and uncritically enamored of a system which has significant flaws that are too often overlooked. (religion-online.org)
Francis Canavan's cautionary words regarding these fruits are worth heeding, lest we become inattentive or indifferent and thereby abandon our constitutional and moral heritage to this new «mainstream» of political thought. (firstthings.com)