" الْكَبَائِرُ الشِّرْكُ بِاللَّهِ وَعُقُوقُ الْوَالِدَيْنِ وَقَتْلُ النَّفْسِ وَقَوْلُ الزُّورِ "
It was narrated that 'Ubaidullah bin abi Bakr said: "I heard Ana's say: 'The Messenger of Allah said: 'the major sins are; associating others with Allah (shirk), disobeying one's parents, killing a soul (murder) and speaking falsely.