It was never enough for Tai Lung.
4 seconds sound clip from the Kung Fu Panda movie soundboard.
You can hear this line at 00:40:24 in the Blu-ray version of the movie.
Quote context
[...]
- Shifu found him as a cub and he raised him as his son.
- And when the boy showed talent in kung fu
- He believed in him. He told him he was destined for greatness.
- It was never enough for Tai Lung.
- He wanted the Dragon Scroll.
- But Oogway saw darkness in his heart and refused.
- Outraged, Tai Lung laid waste to the valley.
- He tried to take the scroll by force.
- And Shifu had to destroy what he had created.
[...]