zurb-foundation-5/doc/includes/form/examples_form_errors.html

Foundation 5 for npm (no code modification from original repo)

<form>
  <div class="row">
    <div class="large-6 columns">
      <label class="error">Error
        <input type="text" class="error" />
      </label>
      <small class="error">Invalid entry</small>
    </div>
    <div class="large-6 columns error">
      <label>Another Error
        <input type="text" />
      </label>
      <small class="error">Invalid entry</small>
    </div>
  </div>
  <textarea class="error" placeholder="Message..."></textarea>
  <small class="error">Invalid entry</small>
</form>