Sahih Muslim 88
Sahih Muslim · Book 1: The Book of Faith · The major sins and the most serious of them
Ubaidullah b. Abu Bakr said:
وَحَدَّثَنَا مُحَمَّدُ بْنُ الْوَلِيدِ بْنِ عَبْدِ الْحَمِيدِ ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ ، حَدَّثَنَا شُعْبَةُ ، قَالَ حَدَّثَنِي عُبَيْدُ اللَّهِ بْنُ أَبِي بَكْرٍ ، قَالَ سَمِعْتُ أَنَسَ بْنَ مَالِكٍ ، قَالَ ذَكَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْكَبَائِرَ - أَوْ سُئِلَ عَنِ الْكَبَائِرِ - فَقَالَ " الشِّرْكُ بِاللَّهِ وَقَتْلُ النَّفْسِ وَعُقُوقُ الْوَالِدَيْنِ " . وَقَالَ " أَلاَ أُنَبِّئُكُمْ بِأَكْبَرِ الْكَبَائِرِ " . قَالَ " قَوْلُ الزُّورِ " . أَوْ قَالَ " شَهَادَةُ الزُّورِ " . قَالَ شُعْبَةُ وَأَكْبَرُ ظَنِّي أَنَّهُ شَهَادَةُ الزُّورِ .
I heard Anas b. Malik saying: The Messenger of Allah (ﷺ) talked about the major sins, or he was asked about the major sins. Upon this he observed: Associating anyone with Allah, killing of a person, disobedience to parents. He (the Prophet further) said: Should I not inform you about the gravest of the major sins, and (in this connection) observed: False utterance or false testimony. Shu'ba said. It was most probably" false testimony".