\documentclass[12pt,oneside]{book}
\usepackage{cite}
\usepackage{xepersian}
\settextfont[Scale=1]{XB Niloofar}
\setlatintextfont[Scale=1]{Times New Roman}
\renewcommand\citemid{}
\begin{document}

سلام. 
\citemid{[b1 و b2]}.

حالا دوتایی: 
\citemid{[b1 ، b2 و b3]}

\bibliographystyle{unsrt}
\begin{thebibliography}{99}
\begin{LTRitems}
\resetlatinfont
\bibitem{b1} \bibitem{b2} \bibitem{b3} \bibitem{b4} \bibitem{b5} 
\end{LTRitems}
\end{thebibliography}
\end{document}