Abu Dawud
Wills
Book Number: 011 / Hadith Number: 2869
Narated By 'Umar ibn al-Khattab : A Companion of the Prophet (pbuh) said: A man asked him (the Prophet): Apostle of Allah, what are the grave sins? He replied: They are nine. He then mentioned the tradition to the same effect. This version adds: "And disobedience to the Muslim parents, and to violate the sacred House, your qiblah (direction of prayer), in your life and after death.