The Saudi crown prince extended the invitation during a telephonic conversation between the two leaders.
During the conversation, the premier said that it was Pakistan's top priority to develop relations with Saudi Arabia. He described Saudi Arabia as a friend that Pakistan trusts and thanked the crown prince for his efforts and support.
Two-day visit: Imran Khan in Saudi Arabia on first foreign trip as PM
"Pakistan cannot forget Saudi Arabia's constant standing in all adversities and difficult times," he said.
In response, the Saudi crown prince praised the distinguished relations between the two countries and lauded the efforts of Pakistan and Saudi Arabia to strengthen their ties in different fields.
The crown prince also expressed that the Saudi leadership was keen to support Pakistan in all fields.
Imran visited Saudi Arabia last year in September in his first foreign trip after assuming office. The premier visited the kingdom for the second time in October to attend a key investment conference in Riyadh.
PM Imran arrives in Saudi Arabia to attend key investment conference
After the visit of the prime minister, Saudi Arabia announced to provide a $6 billion lifeline to Pakistan on an annual basis in the shape of cash assistance and oil on deferred payments.
The kingdom also agreed to reduce visa fees for Pakistanis.
Saudi Arabia agreed to bail out Pakistan during the second visit of the prime minister, as the agreement could not be reached during his September visit to the kingdom.
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