how to add limit records in wordpress query

What you want to do, can be achieved by means of the WP_Query class.

$query = new WP_Query(array(
    'post_type' => 'quote2',
    'posts_per_page' => 10, // or something else
));

Now you can work with $query like:

if ($query->have_posts()) {
    while ($query->have_posts()) {
        $query->the_post;
        ?>
        <h1><?php the_title(); </h1>
        <?php the_content();
        <?php
    }
else {
    // No posts...
}

If you just want to get access to the posts, you can do so via $query->posts.