Once you have found a statute or constitutional section on Westlaw or Lexis Advance, you can use it to find cases that cite it.
You can look at the Notes of Decision (short synopses written by editors) or Citing References (everything that cites your statute/constitutional section).
The Notes of Decision are short synopses written by editors and organized by topic into a short subject index on the left of the screen.
You can use the search feature to search the text of the short snyopses.
Citing References are everything that cite your statute or constitutional section.
You can limit the citing references to cases, and then limit by jurisdiction, date, publication status, etc., and you can use the Search Within Results feature to search within the full text of the cases.