Hadith #4020 (Sunan al-Nasa'i)
Book: The Book of Fighting [The Prohibition of Bloodshed]
Narrator(s): al-Fadl bin Dakayn, Abu Na'eem الفضل بن دكين أبو نعيم الملائي, Arfjh bin Shryh, Ziyad bin 'Alaqa زياد بن علاقة

“I heard Anas 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.'”

Source: https://parallelquran.com/hadith/sunan-al-nasai-4020/

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Hadith #4021 (Sunan al-Nasa'i)
Book: The Book of Fighting [The Prohibition of Bloodshed]
Narrator(s): Arfjh bin Shryh, Muhammad bin Maymun, Abu Hamza محمد بن ميمون المروزي أبو حمزة السكري, Ziyad bin 'Alaqa زياد بن علاقة

The Prophet  said: “The major sins are: Associating others with Allah, disobeying parents, killing a soul (murder) and swearing a false oath knowingly.”

Source: https://parallelquran.com/hadith/sunan-al-nasai-4021/