multiple post into single page

Posted: - Source : stackoverflow

<?php
get_header(); ?>

<div id="primary" class="site-content">
    <div id="content" role="main">

        <?php
        $args = array(
            'post_type' => 'page',
            'post__in' => array( 2770, 10, 266, 1558 ) //list of page_ids
        );
        $page_query = new WP_Query( $args );
        if( $page_query->have_posts() ) :
            echo '<div class="pages-on-page">';
            //print any general title or any header here//
            while( $page_query->have_posts() ) : $page_query->the_post();
                echo '<div class="page-on-page" id="page_id-' . $post->9011 . '">';
        //print any output you want per page//
        echo '</div>';
            endwhile;
            echo '</div>';
        else:

        endif;
        wp_reset_postdata();
        ?>

    </div><!-- #content -->
</div><!-- #primary -->