I heard one night he had to belt a guy three times before the guy finally went down.

6 seconds sound clip from the Casino (1995) movie soundboard.

You can hear this line at 02:23:30 in the Blu-ray version of the movie.

Quote context

[...]

- By now, Nicky and his crew had already hit rock bottom.

- I mean, Vegas really got to him. The booze, the coke, the broads... I mean, he got sloppy.

- He just wasn't the same Nicky anymore.

- You must have drank too much.

- Go fuck yourself.

- I heard one night he had to belt a guy three times before the guy finally went down.

- In the old days, Nicky would have decked him with one shot.

- You add this into the mix

- Maybe just Vegas got to all of us.

- His crew followed him right over the edge.

[...]