Explanation

The meaning in a few plain lines

The Prophet (may Allah's peace and blessings be upon him) demonstrates the major sins, whose perpetrators are given a severe warning in this world and the Hereafter. The first of them is "associating partners with Allah": This is to devote any form of worship to other than Allah and regard anyone as equal to Allah in His peculiar traits, including His divinity, lordship, names, and attributes. The second among them is "undutifulness to parents": Anything that causes hurt to one's parents, whether by word or deed and not showing kindness to them. The third among them is "murder": without right, like killing by way of oppression and aggression. And the fourth is "the intentional false oath": This is to take a false oath while knowing it to be false. It is called that (in Arabic: ghamūs) because it dips (taghmis) its perpetrator in sin or Hellfire.