How to use a jade template to accept information from multiple sources and display with include statements

I have this template:

.bar
  .titleBox
    a.title(href=URL) #{title}

Which I want to include multiple times in another page, titles.jade, like so:

#contentBox
  include bar
  include bar
  include bar

And I want each one to have a different value for URL and title.

I have this code in node:

read(function(post){ //post is an array of objects retrieved from a mongodb collection
    // I was thinking of using a for loop to iterate through the array
    res.render('titles', {title: post[i].title, url: post[i].URL});

How might I achieve my desired outcome?

I'm not sure what these objects represent, but I'll assume for now we are talking about books. If your jade template can get a list of books as a local - e.g. if it's redered like: 

res.render('books_index', {books: [{title: 'dune', url: 'http://www.dunenovels.com'},...]})

You can use a mixin. Something like this:

mixin listBooks(books)
  each book in books
    .bar
      .titleBox
        a.title(href=book.url)= book.title

later in your template you can render the mixin:

mixin listBooks(books)