You have to create custom template file for your requirement.
Follow the below steps:
1. Create a file (custom-template.php) in your theme folder (wp-content/themes/fifteen) and past below code:
<?php
/*
Template Name: Custom Template
*/
get_header(); ?>
<div id="primary-main" class="content-area col-md-12">
<main id="main" class="site-main row container" role="main">
<?php
query_posts( array(
'post-type','post',
'orderby' => 'date',
'order' => 'DESC', ) );
?>
<?php if ( have_posts() ) : ?>
<?php /* Start the Loop */ $ink_count = 0; $ink_row_count=0 ?>
<?php while ( have_posts() ) : the_post();
if ($ink_count == 0 ) {echo "<div class='row-".$ink_row_count." row'>";}
?>
<?php
/* Include the Post-Format-specific template for the content.
* If you want to override this in a child theme, then include a file
* called content-___.php (where ___ is the Post Format name) and that will be used instead.
*/
get_template_part( 'content', 'home' );
?>
<?php
if ($ink_count == 2 )
{
echo "</div>";
$ink_count=0;
$ink_row_count++;
}
else {
$ink_count++;
}
endwhile;
?>
<?php fifteen_pagination(); ?>
<?php else : ?>
<?php get_template_part( 'no-results', 'index' ); ?>
<?php endif; ?>
</main><!-- #main -->
</div><!-- #primary-main -->
<?php get_sidebar('footer'); ?>
<?php get_footer(); ?>
2. Go to your page (Dashboard > Pages > Your Page) and select template ‘Custom-Template’ from page attributes at right side.
Screenshot Link -> https://pageshot.net/images/4dbd5402-bdb3-4207-8d0a-ec7fb4e45c43
