I was told that some of my comments got lots of likes. However, I don’t remember it. So I want to find out which one is it and where. How can I do this?
There is no way to do this using Facebook desktop interface. Additionally, unless you know the URL it will be near impossible to find this in the API.
Pretty much the only way you possibly could, is by going to your "activity log" and scrolling through all your posts/comments. Kind of annoying and time consuming. If you remember the date of the comment though that narrows it down a lot more. I wish they offered a feature for this!