Volume 8, Book 73, Number 7:
Narrated 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 state –
ment 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.