A former Honduran mayor and admitted mass murderer testified in Manhattan court Monday that he personally witnessed Mexican drug lord Joaquin “El Chapo” Guzman deliver a $1 million bribe to the political campaign of current Honduran President Juan Orlando Hernández.

The testimony surfaced at the trial of the president’s brother, Juan Antonio Hernandez Alvarado, in federal court for alleged drug trafficking.

Amilcar Alexander Ardon, a murderous former Honduran mayor-turned-government witness in the case, told federal jurors that he saw the $1 million in cash — bundled in $50,000 and $100,000 piles — laid out on the table by Guzman during a meeting with Hernandez Alvarado.

“Chapo told Tony that he would be giving him one million dollars for Juan Orlando’s campaign,” testified Ardon, using Hernandez Alvarado’s nickname.

“Chapo asked Don Amado to go to the car and bring in the money,” the 43-year-old told the jury. “It was then laid out on the table. We counted the money. The money was contained in plastic bags. And it was in fifty-thousand and one-hundred-thousand-dollar bundles.”

Prosecutors said last week during openings in Hernandez Alvarado’s trial that jurors could expect to hear about a bribe made by Guzman, who is serving a life sentence plus 30 years in a Colorado super-max prison for drug trafficking.

Ardon testified that the meeting took place in the Honduran municipality of El Paraiso when he served as the mayor.

The Honduran president has vehemently denied any wrongdoing, and lawyers for his brother claim there is no evidence to substantiate Ardon’s story.

During his Monday testimony, Ardon also admitted to being behind at least 56 murders.

Hernandez Alvarado faces up to life behind bars if convicted.

His trial is expected to last two weeks.

With Post wires