"If a woman makes Ghusl after her menstrual cycle ends and offers two Rakhas in which she recites Chapter Al-Fatehah and Chapter Al-Ikhlas, three times in each Rakah, Allah forgives all her sins, be they minor or major, she isn`t held accountable to any sin until her next menstrual period, Allah grants her the reward of sixty martyrs, builds her a city in Jannah, grants her light for evey hair on her head, and in case she dies before her next period she is considered a martyr." How authentic is this Hadith?