World Bulletin / News Desk
"Lawmakers in the General National Congress told me about threats made by some MPs if I didn't quit," Zeidan told a press conference, giving no further details.
The premier said that he intended to resign if parliament succeeded in withdrawing confidence from his government.
Last week, parliament failed to secure the necessary votes to withdraw confidence from Zeidan's government since not enough lawmakers had shown up for the session.
At least 120 of 196 lawmakers must be present in order to hold a vote of no-confidence.
Libyans have struggled to restore order to their country since the death of strongman Muammar Gaddafi in late 2011.
The transitional government and its security forces, meanwhile, have struggled to contain the armed militias that helped overthrow Gaddafi but which held onto their weapons after the 2011 uprising.
"The death toll has reached 154 with 463 others wounded, some seriously," Ammar Mohamed told Anadolu Agency.
Clashes between security forces and loyalists of late strongman Muammar Gaddafi have ravaged Sabha in southern Libya and al-Ujaylat and Rashfana in westernLibya.
The spokesman said that some of the injured Libyans have been flown for treatment in foreign countries such as Turkey and Tunisia, warning that hospitals near the flashpoint areas lack medical supplies.
The UN Humanitarian Coordinator in Libya (UNSMIL) has expressed concern about the effects of the clashes which had led to the displacement of hundreds of families.
In a statement on Sunday, it warned that as a result of the clashes, the area is suffering from shortages of food supplies, medicine and fuel.
UNSMIL appealed to all sides to end violence and guarantee the protection of civilians.
It also called on all parties to allow for the unimpeded delivery of humanitarian support.