\documentclass[12pt,a4paper]{report}
\usepackage{amsthm,amssymb,amsmath}
\usepackage[top=40mm, bottom=40mm, left=25mm, right=35mm]{geometry}
\usepackage{graphicx}
\usepackage{xepersian}
\settextfont[Scale=1.1]{XB Niloofar}
\setdigitfont[Scale=1.1]{Persian Modern}
\defpersianfont\nastaliq[Scale=2]{IranNastaliq}
\defpersianfont\chapternumber[Scale=3]{XB Niloofar}
\renewcommand{\bibname}{مراجع}


\begin{document}

سلام

\end{document}