get thumbnail of a website from the url wordpress code example

Example 1: wordpress get post thumbnail url

<?php 
  // ALL parameters are optional. Not needed if you are on WP LOOP
  echo get_the_post_thumbnail_url( $the_query->ID, array( 500, 400) ); ?>

Example 2: wordpress thumbnail url

<img src='<?php the_post_thumbnail_url(); ?>'>