Sahih Bukhari Volume 8, Book 78, Hadith 5978

حَدَّثَنِي إِسْحَاقُ، حَدَّثَنَا خَالِدٌ الْوَاسِطِيُّ، عَنِ الْجُرَيْرِيِّ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي بَكْرَةَ، عَنْ أَبِيهِ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَلاَ أُنَبِّئُكُمْ بِأَكْبَرِ الْكَبَائِرِ ‏"‏‏.‏ قُلْنَا بَلَى يَا رَسُولَ اللَّهِ‏.‏ قَالَ ‏"‏ الإِشْرَاكُ بِاللَّهِ، وَعُقُوقُ الْوَالِدَيْنِ ‏"‏‏.‏ وَكَانَ مُتَّكِئًا فَجَلَسَ فَقَالَ ‏"‏ أَلاَ وَقَوْلُ الزُّورِ وَشَهَادَةُ الزُّورِ، أَلاَ وَقَوْلُ الزُّورِ وَشَهَادَةُ الزُّورِ ‏"‏‏.‏ فَمَا زَالَ يَقُولُهَا حَتَّى قُلْتُ لاَ يَسْكُتُ‏.‏

Narrated By Abu Bakra : Allah's Apostle said thrice, "Shall I not inform you of the biggest of the great sins?" We said, "Yes, O Allah's Apostle" He said, "To join partners in worship with Allah: to be undutiful to one's parents." The Prophet sat up after he had been reclining and added, "And I warn you against giving forged statement and a false witness; I warn you against giving a forged statement and a false witness." The Prophet kept on saying that warning till we thought that he would not stop.