Lil Cease was one of The Notorious B.I.G.‘s closest friends before his untimely death, but even he has been left picking up his jaw off the floor after discovering the sample behind the late rapper’s classic song “Who Shot Ya?”

In a video posted on Instagram by the Notorious B.I.G. tribute band The Frank White Experience, the Junior M.A.F.I.A. rapper can be seen listening to David Porter’s 1971 track “I’m Afraid the Masquerade is Over,” which provided the soundbed for Biggie’s infamous 1995 diss track against 2Pac.

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While listening to David Porter’s song, Cease realizes that it was flipped by Diddy, The Trackmasters and Nashiem Myrick for “Who Shot Ya?”

He says while vibing to the soul record: “So this where it came from? Like, damn! This shit is like school for me, I like to find shit like this. They was on some shit!”

“Who Shot Ya?” was originally meant for Mary J. Blige but Diddy and Uptown Records executives thought it was “too hard.”

“I’m Afraid the Masquerade is Over” originally came out in 1971 from Porter’s album …Into a Real Thing.

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He is an inductee into the Songwriters Hall of Fame and known for his collaborations with Isaac Hayes, Aretha Franklin and James Brown.

In other Lil Cease news, the Brooklyn native previously admitted that Biggie actually wrote all of his rhymes.

LL COOL J Clears Up Biggie's Alleged 'Who Shot Ya?' Diss: 'I Was In The Studio With [Him]'
LL COOL J Clears Up Biggie's Alleged 'Who Shot Ya?' Diss: 'I Was In The Studio With [Him]'

“I started rapping after Biggie passed when I had to write my album. In them times before that, Biggie was writing the raps for me,” he said in an interview with VladTV. “Everybody else was writing their rhymes though.”

“Most of the artists from Junior M.A.F.I.A rapped; I just wasn’t a rapper. It was an idea he had just for me performing with him that whole year before we got our record deal. His album came out in ’94, we came out in ’95, so it was like a business move for him, something he wanted to try out.”

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Cease added: “He used to try to get me to rap. I was just intimidated because this n-gga was so nice, so dope. I can’t write nothing nowhere near close to what the fuck this n-gga was doing.

“He used to always tell me, ‘Don’t worry about what you say, it’s how you say it.’ He was just like ‘Yo, I’m going to write you a bunch of raps, and you going to deliver them.’”