Hazrat Abu Bakarah Nufai Ibn Haris (r.a.) relates:

The Holy Prophet of Allah (sallallaahu alaihi wa sallam) said:
'May I tell you what the major sins are?  (He repeated this thrice).
We said:
'Certainly, O;  Messenger of Allah.'
He said:
'Association of other with Allah:
disobedience of parents,'
(he had been resting on a pillow, then he sat up and continued)
'and telling lie and giving false testimony.'
He repeated this sentence so many times that we wished he should stop.
(Bukhari & Muslim)