Change WordPress password form post

functions.php

add_filter('the_password_form', 'change_password_form_text' );
function change_password_form_text( $post = 0 ) {
    $post   = get_post( $post );
    $label  = 'pwbox-' . ( empty( $post->ID ) ? rand() : $post->ID );
    $output = '<form action="' . esc_url( site_url( 'wp-login.php?action=postpass', 'login_post' ) ) . '" class="post-password-form" method="post">
        <p>' . __( 'Here is your text:', 'textdomain' ) . '</p>
        <p><label for="' . $label . '">' . __( 'Password:' ) . ' <input name="post_password" id="' . $label . '" type="password" size="20" /></label> <input type="submit" name="Submit" value="' . esc_attr_x( 'Enter', 'post password form' ) . '" /></p></form>';
    return $output;
}