Hadith 6

“the Messenger of Allah (ﷺ) said, "Shall I tell you which is the worst of the major Sins?" "Yes, Messenger of Allah," they replied. He said, "Associating something else with Allah and disobeying parents." then he said, "and false witness." Abu Bakra (رضي الله عنه), said, "He continued to repeat it until I said, 'Is he never going to stop?”