Friends to Foes
Notorious B.I.G. and 2Pac
1994 - 1996

In a radio interview with Billboard reporter Angie Martinez, Shakur laid out his issues with Wallace and Bad Boy Records. “[Wallace] acted like he didn’t know what happened when I [was attacked],” Shakur explained. "Puffy’s the one that really snapped me back to my senses. When this punk mutha f*cka said, thug life, you going to be a thug, you gotta be a thug forever, you can’t go in and out of it... okay, now when a cream puff n**** like that tell me that, it’s time to ride." (Ranker)

A few months after the attack on Shakur at Quad Recording Studios, Wallace dropped the song "Who Shot Ya?" as a B-side to his hit single "Big Poppa." The song was recorded in 1994, before Shakur was attacked, but fans have theorized that its lyrics are about the impending attack. (Ranker)

1994
Its on . f -- all that bickering beef / I can hear sweat trickling down your cheek
Notorious B.I.G.
Who Shot Ya
2Pac

"Any artist out there wanna be an artist, and wanna stay a star, and don't have to worry about the executive producer trying to be all in the videos, all on the records, dancing - come to Death Row" - Suge Knight, the 1995 Source Awards in New York City

The infamous diss track, released as a B-side to his single “How Do you Want it,” was Shakur’s retaliation to his issues with Wallace and Combs. The song attacks Wallace's weight, his wife Faith Evans, Combs, and Bad Boy Records. He also specifically mentions the ambush at Quad, stating in the chorus, "Who shot me, but ya punks didn't finish / Now ya 'bout to feel the wrath of a menace.” (Ranker)

1996
Biggie Smalls and Junior M.A.F.I.A., some mark ass b -- es / We keep on comin', while we runnin for your jewels / Steady gunnin', keep on busting at them fools, you know the rules
2Pac
Hit 'Em up
Notorious B.I.G.

Tupac was shot after a Tyson fight in Las Vegas on 7 September 1996 and died of internal bleeding six days later in critical care at the University Medical Centre. Biggie was hospitalised in a car crash that same year and began walking with a cane. Combined with his physical heft and penchant for expensive suits, it made him look much older than his 24 years: Big Poppa, as he called himself in one song. On 9 March 1997, after attending a party in Los Angeles, he [Biggie] was also fatally hit in a drive-by shooting. - The Guardian