single.php

<?php
/**
 * The Template for displaying all single posts
 *
 * Methods for TimberHelper can be found in the /lib sub-directory
 *
 * @package  WordPress
 * @subpackage  Timber
 * @since    Timber 0.1
 */

$context         = Timber::context();
$timber_post     = Timber::get_post();
$context['post'] = $timber_post;

$popular_posts_args = array(
   'posts_per_page' => 5,
   'meta_key' => 'my_post_viewed',
   'orderby' => 'meta_value_num',
   'order'=> 'DESC'
);

$popular_posts_loop = Timber::get_posts($popular_posts_args);

$context ['topposts'] =$popular_posts_loop;

if ( post_password_required( $timber_post->ID ) ) {
	Timber::render( 'single-password.twig', $context );
} else {
	Timber::render( array( 'single-' . $timber_post->ID . '.twig', 'single-' . $timber_post->post_type . '.twig', 'single-' . $timber_post->slug . '.twig', 'single.twig' ), $context );
}