\documentclass[14pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{fontspec}
\usepackage{polyglossia}
\usepackage{graphicx}
\usepackage{geometry}
\geometry{top=2cm, bottom=2cm, left=2cm, right=2cm}
\usepackage{background}
\usepackage{xcolor}
\setmainlanguage{arabic}

\newfontfamily\arabicfont[Script=Arabic]{Amiri Quran}

% Define the background settings
\backgroundsetup{
    scale=1,
    opacity=1,
    angle=0,
    position=current page.south,
    vshift=14.8cm, % Adjust the vertical shift as needed
    contents={%
      \includegraphics[width=\paperwidth,height=\paperheight]{frame.jpg}
    },
    color=blue!25
}

\begin{document}
\begin{center}
\vspace*{3.5cm}
\fontsize{40}{50}\selectfont
بِسْمِ ٱللَّهِ ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ\\
ٱلْحَمْدُ لِلَّهِ رَبِّ ٱلْعَـٰلَمِينَ
ٱلرَّحْمَـٰنِ ٱلرَّحِيمِ
مَـٰلِكِ يَوْمِ ٱلدِّينِ
إِيَّاكَ نَعْبُدُ وَإِيَّاكَ نَسْتَعِينُ
ٱهْدِنَا ٱلصِّرَٰطَ ٱلْمُسْتَقِيمَ
صِرَٰطَ ٱلَّذِينَ أَنْعَمْتَ عَلَيْهِمْ غَيْرِ ٱلْمَغْضُوبِ عَلَيْهِمْ وَلَا ٱلضَّآلِّينَ
\end{center}
\end{document}