Of the Major Sins
Abdullah bin Amr bin Al-as (radi Allahu anhum) reported that the Prophet (sal Allahu alaihi wa sallam) said, “(Of the) major sins are: to ascribe partners to Allah, disobey parents, murder someone, and to take a false oath (intentionally).”
There are many more major sins which have been enlisted and discussed at length by Muhaddathun in independent volumes, such as Az-Zawajir ‘an iqtraf-al-Kaba’ir, Kitab-al-Kaba’ir by Adh-Dhahabi.
This Hadith mentions some of the major sins enumerated by the Prophet (sal Allahu alaihi wa sallam) on a particular occasion. We can also say that the sins mentioned here are some of the most serious among the major sins.
And Allah Knows Best!