An online lender gave California terrorist Syed Rizwan Farook a $28,500 loan just two weeks before he and his jihadi wife massacred 14 people, federal law-enforcement sources revealed on Tuesday.

The money, which was borrowed from the San Francisco-based company Prosper, was deposited into Farook’s bank account on or about Nov. 18.

A couple of days later, the soon-to-be mass murderer took out $10,000 in cash from a Union Bank branch in San Bernardino.

Investigators believe Farook may have used those funds to stockpile weapons and reimburse his friend and neighbor Enrique Marquez, who purchased two .223-caliber assault rifles used during the shooting.

Shortly before the slaughter, at least three transfers of $5,000 each were made from Farook’s account to his mother, Rafia, who is now being investigated by federal authorities, sources said.

Another withdrawal of $600 was made from the bank account the night before the shooting, according to the Los Angeles Times.

While Prosper evaluated Farook and awarded him the $28,500 loan, the money originated from a third party, a Utah-based bank called WebBank, Reuters reported.

Farook’s behavior mirrors that of other US-based extremists who have depleted their bank accounts and maxed out their credit lines before embarking on supposed suicide missions, a government source told Reuters.

The loans and withdrawals show “significant evidence of premeditation,” a source told Fox News.

A spokesperson for Prosper said the company “is prohibited by law from disclosing any nonpublic, personally identifiable information regarding any loan originated through our platform.”

“All loans originated through the Prosper platform are subject to all identity verification and screening procedures required by law, including US anti-terrorism and anti-money-laundering laws,” the representative added.

WebBank said it will be working with “regulators to address their inquiries and concerns and will fully cooperate with law-enforcement agencies investigating this matter.”

As the investigation continued, federal authorities discovered an empty GoPro camera package, gun targets and tools in a black Lexus sedan registered to Farook’s mother, who lived with her son.

Law-enforcement sources said the GoPro box was among several suspicious items — including a hammer, vise grips and an iPhone — recovered from the car.

Farook and his mother are both listed on the vehicle’s insurance documents.

It also emerged that both Farook and his bride, Tashfeen Malik, pledged their support to ISIS in the Facebook statement she posted on the day of last Wednesday’s shooting inside the Inland Regional Center.

The posting proclaimed, “We pledge allegiance” to ISIS leader Khalifah Abu Bakr al-Baghdadi Al Qurashi — the “we” suggesting that Malik had published the message on the couple’s behalf, according to the Washington Post.

“It’s looking like they were on the same path at the same time,” an official told the newspaper.

The couple’s 6-month-old daughter remains in custody of San Bernardino County Child Protective Services.

Meanwhile, it was also revealed Tuesday that Farook may have been plotting a terror attack as far back as 2012.

CNN reported that he and an unidentified co-conspirator were considering a target, but “got spooked” when a number of terror arrests were made in the area.