Every now and then, I want to post a sample code block for my blog that displays a liquid template. However, if I simply paste in a liquid template, it will be rendered.

Then I found the {% raw %} and {% endraw %} tags. So, you may want to wrap your source like so:

 {% raw %}{% include foobar.html %}{% endraw %}

This will display a proper code sample in your post like so:

{% include foobar.html %}

While you really only need to put the first {% inside a raw tag to escape, I have a habit of also following with the last %} as well.