Here is a comprehensive list of samples that The Prodigy have used in their remixes to other artists.
Sample: the sound of bongos at the start
Taken from: Graham Central Station's track called "The Jam" that can be found from Ain't No Bout-A-Doubt It (Warner Brothers 1975) album.
Taken from: Chill Rob G - Court Is Now In Session
Sample: Horn Sample
Taken from: Ennio Morricone - Il Colpo
Includes also sample of the "Vicious" Black Mamba. The original track and the remix contain the same ringing sound as the "Claustrophobic Sting" and "Live Beats"
Sample: the first beat
Taken from: "Amen Brother" The Winstons
Bug Kann & The Plastic Jam - Made In Two Minutes (Prodigy Mix)
First Has the same beat (single shot, distorted) as in "Casanova (Prodigy Mix)"
The Art Of Noise - Instruments Of Darkness (The Prodigy Mix)
First It contains the same "Ouuu" what the G-Force
Dream Frequency featuring Debbie Sharp - Take Me (Prodigy Mix)
First Beat comes from "Radio Babylon" Meat Beat Manifesto
Sample: Vocal 'These guys are dope and they're doper than dope'
Taken from: The Dynamic Guv'nors - "These Guys Are Doper Than Dope (Junglestic Remix )" (Summerdub, 1992)