Diddy's beef with 50 Cent popped up at mogul's criminal trial during mention of shared manager Chris Lighty

Sean "Diddy" Combs' long-running feud with rapper 50 Cent was spotlighted in testimony given at the hip-hop mogul's criminal sex-trafficking trial this week.

50 Cent later took an online jab at Combs over the Tuesday testimony from Combs' former personal assistant and top executive, Capricorn Clark.

While on the witness stand in Manhattan federal court, Clark was asked by prosecutor Mitzi Steiner whether Clark ever heard Combs discuss guns during her stint working for the music tycoon.

Clark responded "once" and then went on to describe a time following an MTV press event that involved 50 Cent, whose real name is Curtis Jackson III.

Following the event, which both Combs and Jackson attended, Clark told the jury that Combs mentioned the rappers' beef to late music manager Chris Lighty, who at the time represented both men.

Music manager Chris Lighty represented Sean "Diddy" Combs and 50 Cent. Johnny Nunez/WireImage

Lighty, who also managed artists like Missy Elliott, Busta Rhymes, and Mariah Carey, was found dead from a gunshot wound in his Bronx apartment in 2012. His death was later ruled a suicide by the New York City medical examiner.

Combs "was doing MTV press with 50 Cent and after the interview wrapped up, myself, Puff, and Chris Lighty got in the elevator," Clark said, referring to Combs as "Puff."

Clark testified that while in the elevator, "Puff told Chris, because they were having some sort of issue, like, 'I really don't like all the back and forth, I don't do that, I like guns.'"

"And what's the issue, with an individual?" the prosecutor asked.

"He had an issue with 50 Cent," Clark said.

Clark — who also testified that Combs kidnapped her at gunpoint in 2011 and made threats against her life — said Combs' demeanor was "very serious" when he brought up his fondness for guns.

Following the testimony, Jackson took the opportunity to troll Combs on Instagram writing in a caption: "Wait a minute PUFFY's got a gun, I can't believe this I don't feel safe 😔LOL."

Jackson has been working on a documentary for Netflix about the sex assault allegations against Combs.

The feud publicly erupted when Jackson released a 2006 diss track accusing Combs of knowing who killed rapper Notorious B.I.G. in 1997.

Combs' trial is now in its third week.

Prosecutors allege that for two decades, the one-time near-billionaire led a criminal enterprise that involved the sex trafficking of his ex-girlfriend, R&B singer Cassie Ventura, and another woman.

If convicted of the sex trafficking and racketeering charges against him, Combs could face up to life in prison.