\documentclass{book}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsthm}

\usepackage{xepersian}

\begin{document}
\chapter{الف}
\section{ب}
\subsection{پ}
\subsubsection{ج}
\end{document}