Wp Next-Prev

<?php

  $prev_post = get_previous_post();
  $id = $prev_post->ID;
  $permalink = get_permalink( $id );

  $next_post = get_next_post();
  $nid = $next_post->ID;
  $permalink = get_permalink($nid);
  
?>
<nav class="post-nav">

  <span class="nav-previous col-lg-6"><?php previous_post_link( '%link', __( '', '' ) ); ?>
    <h3>
      <a href="<?php echo $permalink; ?>"><?php echo $prev_post->post_title; ?></a>
    </h3>
    <p>
    <?php
    echo wp_trim_words( $prev_post->post_content, $num_words = 26, $more = '<a href="#">Read all ;)</a>' );
    ?>
    </p>
  </span>
  
  <span class="nav-next col-lg-6"><?php next_post_link( '%link', __( '', '' ) ); ?>
    <h3>
      <a href="<?php echo $permalink; ?>"><?php echo $next_post->post_title; ?></a>
    </h3>
    <p>
    <?php
    echo wp_trim_words( $next_post->post_content, $num_words = 26, $more = '<a href="#">Read all ;)</a>' );
    ?>
    </p>
  </span>
  
</nav>