Custom order of posts array

How can I order the pages for this array in a custom way instead of by title ASC? ie. would something like ‘order’ = ‘5, 1, 26, 54’ work? (where the numbers are the post id’s).

$args = array(
'post_type' => 'page',
'numberposts' => -1,
'post_status' => null,
'post_parent' => $post->ID,
'order' => ASC,
'orderby' => title);