You had no business letting him go.
2 seconds sound clip from the The Sword in the Stone (1963) movie soundboard.
You can hear this line at 00:17:19.772 in the Blu-ray version of the movie.
Quote context
[...]
- All right. We'd better get a move on. Come on, lad. Pick up the pace. Pick it up! Pick it up!
- Oh, the devil take it. The devil take it.
- Anyone's got better sense than to go barging off in that infernal forest alone.
- You had no business letting him go.
- Look, Dad, I'm not the Wart's keeper.
- After all, I took him in, adopted the lad, you might say. Being his foster father, I'm responsible.
- Tiger, Talbert, off with you.
[...]