functions.php

// This is your function, you can name it anything you want
function my_custom_search_header_text() { ?> 
	echo '<div class="my-custom-class container">Some Text, could be anything though</div>';
<?php }

// This is the action function that outputs the function above into the theme hook
add_action( 'before_listings_search_header', 'my_custom_search_header_text', 999 );