Eloquent constraint by relationship

I get my data as follows: $completes = Complete::with(['answers', 'survey.location'])->orderBy('created_at', 'DESC')->get();

How can I get all completes where survey.location = 1?

I've tried doing it like Location::where()->with('completes') etc but I need it to be ordered by completes without getting grouped by location

via Chebli Mohamed