عَنْ عَبْدِ الرَّحْمَانِ بْنِ أَبِىْ بَكْرَةَ، عَنْ أَبِيْهِ رَضِىَ اللهُ عَْنهُ قَالَ قَالَ النَّبِيُّ صَلَّى اللهُ عَلَيْه وَسَلَّمَ أَلَا أُنَبِّئُكُمْ بِأَكْبَرِ الْكَبَائِرِ ثَلاَثًا قَالُوْا بَلَى يَا رَسُوْلَ اللَّهِ. قَالَ الْإِشْرَاكُ بِاللَّهِ وَعُقُوْقُ الْوَالِدَيْنِ. وَجَلَسَ وَكَانَ مُتَّكِئًا فَقَالَ أَلَا وَقَوْلُ الزُّورِ. قَالَ فَمَا زَالَ يُكَرِّرُهَا حَتَّى قُلْنَا لَيْتَهُ سَكَتَ
Hazrat Abu Bakrra narrates that the Holy Prophetsa said thrice, “Should I inform you of the gravest of the grave sins?” They said, “Yes, O Allah’s Messengersa!” He said, “Setting up equals to Allah and being disobedient and undutiful to parents.” The Prophetsa then sat up, leaving the cushion he was leaning against, and said [with great force], “Hearken! And lying.” And he repeated this so many times that we wished he had left it off at that [and not strained himself so much.]
(Sahih al-Bukhari, Kitab al-Shahadat, Hadith 2654)