\documentclass[a4paper,12pt]{article}
\usepackage{amsthm,amssymb,amsmath}
\usepackage[all]{xy}
\usepackage{xepersian}

\begin{document}
\begin{displaymath}
\xymatrix{ 0 \ar[r] & \ar[rr]^{inc} \ar[dd]_{\cong}^{\alpha} & & M \ar[rr]^{\pi} \ar[dd]^{\beta} & & \dfrac{M}{S} \ar[r] \ar[dd]^{\theta}_{\cong} &  0 \\
& & \circlearrowleft & & \circlearrowleft & & \\
0 \ar[r] & S^{VU} \ar[rr] && M^{VU} \ar[rr] & & \left(\frac{M}{S}\right)^{UV} \ar[r] & 0 } 
\end{displaymath} 
\end{document}