wp_get_password_hint()

function wp_get_password_hint() {
	$hint = __( 'Hint: The password should be at least twelve characters long. To make it stronger, use upper and lower case letters, numbers, and symbols like ! " ? $ % ^ & ).' );

	/**
	 * Filters the text describing the site's password complexity policy.
	 *
	 * @since WP-4.1.0
	 *
	 * @param string $hint The password hint text.
	 */
	return apply_filters( 'password_hint', $hint );
}