RIYADH — Saudi Crown Prince Mohammed bin Salman authorized a second $3 billion loan to Pakistan on Wednesday, doubling down on Islamabad's mediation efforts between Iran and Israel just as oil markets showed the first signs that diplomacy might work.

The new credit line follows a $5 billion pledge announced Monday. Together, the $8 billion represents the largest Saudi financial commitment to Pakistan since the kingdom's founding.

But this isn't charity. It's influence.

Why Riyadh is betting big on Pakistan's peace push

Pakistani Finance Minister Muhammad Aurangzeb confirmed the deal during a closed-door meeting with Saudi officials in Riyadh. The funds will flow directly into Pakistan's central bank reserves, which have dropped 23% since January as Islamabad burns through dollars funding its Iran mediation mission.

"The Crown Prince sees Pakistan as the only credible broker left," said Bilal Gilani, director of the Pakistan Institute of International Affairs. "Every other regional power has skin in the game."

The timing matters. Pakistan's special envoy Bilawal Bhutto Zardari returned from Tehran on Tuesday with what Pakistani officials describe as Iran's first concrete concession since the war began: a commitment to keep the Strait of Hormuz open for 72 hours while talks continue.

Oil traders noticed. Brent crude fell $1.80 on Wednesday to $89.40 per barrel.

But the Saudi money comes with strings attached that reveal the kingdom's broader strategy. Three conditions, according to Pakistani sources:

First, Pakistan must guarantee that any Iran-Israel ceasefire includes provisions for monitoring Iranian nuclear facilities. Second, Saudi Arabia gets observer status in all Pakistan-mediated talks. Third, any final agreement must address Iran's support for Houthi attacks on Saudi oil infrastructure.

The Saudis are essentially paying Pakistan to negotiate terms favorable to Riyadh.

"This is not charity," said a senior Pakistani diplomat who requested anonymity. "The Saudis want Iran contained, not just pacified."

The financial pressure driving Pakistan's diplomacy

Pakistan's foreign currency reserves stood at $13.2 billion before the Iran mediation began in March. They dropped to $10.1 billion by April 15 as Pakistan funded shuttle diplomacy, increased embassy security, and absorbed the cost of hosting Iranian and Israeli technical teams in Islamabad.

The Saudi loans restore Pakistan's reserves to $18.1 billion. More importantly, they signal to international markets that Pakistan has backing for its mediation role.

Pakistani Prime Minister Shehbaz Sharif flew to Riyadh personally to finalize the deal. That level of engagement suggests Pakistan sees the Saudi support as essential to its credibility.

"Without Saudi backing, Pakistan looks like a broke country trying to mediate between two rich ones," said Maleeha Lodhi, Pakistan's former ambassador to the UN. "With Saudi backing, Pakistan looks like it has regional consensus."

The kingdom's calculation is straightforward. A Pakistan-brokered ceasefire that constrains Iran serves Saudi interests better than continued war that destabilizes oil markets and strengthens Iranian hardliners.

Crown Prince Mohammed has spent five years trying to diversify Saudi Arabia's economy away from oil dependence. The Iran war has pushed oil prices back above $90, generating windfall revenues but also reminding global investors that the kingdom remains vulnerable to regional instability.

What $8 billion buys Saudi Arabia

The money gives Saudi Arabia influence over the terms of any Iran-Israel settlement. Pakistani negotiators now carry Saudi priorities into every meeting with Iranian officials.

Those priorities include dismantling Iran's proxy network, accepting international monitoring of nuclear sites, and ending support for Yemen's Houthis. Iran has rejected all three demands in previous negotiations.

But Pakistan's mediators believe the financial pressure on Iran — sanctions, war costs, domestic unrest — may force Supreme Leader Mojtaba Khamenei to accept constraints his father never would have considered.

"The son is not the father," said one Pakistani official involved in the talks. "He inherited a revolution. He didn't make one."

The Saudi loans also strengthen Pakistan's hand with Iran. Tehran needs Pakistan's mediation to work because no other country offers a credible path to ending the war without total defeat.

Pakistani officials estimate Iran's war costs at $2 billion per month. The country's foreign currency reserves have fallen 40% since the conflict began. Iran's government faces growing protests in at least six provinces.

The next test comes Friday, when Pakistani mediators return to Tehran for what Islamabad describes as "final status talks." The agenda includes prisoner exchanges, reconstruction aid, and the future of Iran's nuclear program.

Oil markets will be watching. So will Saudi Arabia's $8 billion investment in Pakistani diplomacy.

The kingdom has effectively bought itself a seat at the negotiating table. Whether that translates into the kind of Iran containment Saudi Arabia wants depends on how much pressure Mojtaba Khamenei can withstand.

Pakistani negotiators have 72 hours to find out. That's how long Iran promised to keep Hormuz open.