How did the Buddha made Kisa Gotami realize that death is inevitable and change her understanding?

Answer – A lady named Kisa Gotami had only son. One day, her son died. She wanted that anyone help her so that her son become alive again. She wanted some medicines for her son. People started to call her mad. At last, a man advised him to meet Buddha. She approached Buddha with a request to give her a medicine so that her son live again. Buddha asked her to bring a handful of mustard-seed but there was a condition with it. She must bring it from a house where no one had died before. Kisa Gotami went from door to door. She found mustard seed in every home but could not find a house where no one died. By evening, she was sad and tired. Now she realised that death is inevitable. No one can escape from it.