إِنَّا للهِ وَإِنَّـا إِلَيْهِ رَاجِعونَ
I am sad to hear this news , May Allah grant your mother a lofty place in heaven and enable you and your loved ones to bear this great loss . (Ameen)
At this very difficult time, please remember Allah more than you used to do .
Verily it is in the remembrance of Allah that hearts can find comfort -13:29 (Quran)