The Prophet [SAW] said: "The major sins are: Associating others with Allah, disobeying parents, killing a soul (murder) and swearing a false oath knowingly." (Using translation from Nasāʾī 4011)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ الْكَبَائِرُ الْإِشْرَاكُ بِاللهِ ﷻ وَعُقُوقُ الْوَالِدَيْنِ أَوْ قَتْلُ النَّفْسِ شُعْبَةُ الشَّاكُّ وَالْيَمِينُ الْغَمُوسُ