\documentclass{article}
\usepackage{amsmath,amssymb}
\usepackage{xepersian}
\settextfont{XB Kayhan}
\setdigitfont{XB Kayhan}
\begin{document}
\[\mathbf{xyz\theta\beta\delta}\boldsymbol{\alpha\beta\delta}01234\mathbf{01234}\mathit{01234}
\]
\end{document}