Sahih Bukhari
Blood Money (Ad-Diyat)
Volume: 009 / Book Number: 083 / Hadith Number: 10
Narrated Anas bin Malik:
The Prophet said, "The biggest of Al-Kaba'ir (the great sins) are (1) to join others as partners in worship with Allah, (2) to murder a human being, (3) to be undutiful to one's parents (4) and to make a false statement," or said, "to give a false witness."