Ibn Mas'ud (RAA) narrated, ‘l asked the Messenger of Allah ( صلی اللہ علیہ وسلم )“Which sin is the most serious?”He replied, attribute a partner to Allah, though He Alone has created you.“I asked,“What next?”He said, kill your child, fearing that he will share your food with you.”I asked again,“What next?”He said,“To commit adultery with your neighbor’s wife.”Agreed upon.