Are there any examples of finding ancestor elements in an adjacency list db?

I have a DB in SQLite3 and I'm trying to figure out a recurrent query to get all ancestor elements from a many-to-many hierarchy. I can find lots of examples of traveling down the hierarchy, but no examples of going up. I don't need the whole path, just the top level element.

The table is organized like this: parentID | name | childID | level

Thanks!