How to get row x, cell y from a table

How to get row x, cell y from a table

I have googled until my fingers bled and can't get a working answer to what I expected to be a fairly simple, common problem (but I guess not): I need to get the text value from row 5, column 3 of a table.

The user isn't clicking on the cell or the row or the table or anything like that. The table is dynamically built from the server side and I can't assign an id to either the row(s) or the cell(s), but I do have a table id and a table body id. How do you retrieve text given a specific row and column index? Thanks in advance.