How can We get the original image url from wordpres post page

How can We get the original image url from wordpres post page
The below code show the first url of original image

<?php
$photos = get_children( array('post_parent' => $post->ID, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID') );
foreach ($photos as $new_photos)
{
$results = $new_photos->guid;
}
?>