He couldn't ignore it any longer. He had to answer the call of the great open spaces.
10 seconds sound clip from the Fun and Fancy Free movie soundboard.
You can hear this line at 00:09:34 in the Blu-ray version of the movie.
Quote context
[...]
- Some half-forgotten instinct kept calling him. For you see, Bongo was a dreamer.
- Hey, Bongo! Get going! You're on!
- The call of the wild kept ringing in his ears.
- He couldn't ignore it any longer. He had to answer the call of the great open spaces.
- Come on out, Bongo. Bongo, Bongo, come on out, Bongo.
- Come on out, Bongo! Bongo, Bongo.
- At last he was free. Free. Free?
- Oh! But this was even better than he'd expected!
[...]