Get post thumbnail from subpages with a foreach loop

Question

I have created a page that loads content from it's subpages.
The subpages contain post_thubnails. I use a foreach-loop to get the content of all pages.
I just can't get the images loaded.

<?php $args = array(
    'sort_order' => 'asc',
    'sort_column' => 'menu_order',
    'child_of' => $post->ID,
    'post_type' => 'page',
    'post_status' => 'publish'
    ); 
    $pages = get_pages($args); 
    foreach ($pages as $page){
        $file = get_post_meta ( $page->ID, '_wp_attached_file', true );
        echo $file;
        echo '
        <div class="full_width_parallax">
        <div class="wrap_1280">';
        echo $page->post_content;   
    echo '</div>    
    </div>';

    }

?>

Aside from the example code I have also tried the_post_thumbnail(); but no luck.

Any ideas?

Answer 1

Life can be simple:

Instead of the_post_thumbnail I should use get_the_post_thumbnail

echo get_the_post_thumbnail($page->ID)