Img src path from wp-admin

Best to use a images folder in your child theme and output like this:

$output = sprintf( '<img class="your-class" src="https://wordpress.stackexchange.com/questions/259497/%s" alt="https://wordpress.stackexchange.com/questions/259497/%s" />', get_stylesheet_directory_uri() .'/images/image.jpg', get_the_title( $post->ID ) );
echo $output;