"I am going to go back and make sure there is no air conditioning or no tv for Nawaz Sharif who is a criminal. I know (PML-N leader) Maryam Bibi will make some noise, but I say to her, return the money. It's as simple as that," he added.
The 69-year-old former Prime Minister was convicted in the Al Azizia Steel Mills case and sentenced to seven years in jail. He is currently serving the sentence in Lahore's Kot Lakhpat jail.
Khan made these remarks while addressing the Pakistani diaspora during 'Jalsa' in Capital One Arena stadium, which was attended by 30,000 Pakistanis, despite the stadium capacity of 20,000.
Continuing his attack against Sharif, Khan alleged that the PML-N leader was "propped up" by a military dictator.
"Nawaz Sharif was propped up by military dictator. Shahbaz Sharif was propped up because he was his brother. Asif Zardari and Bilawal became leaders on the basis of some piece of paper that left the party behind to them. Similar stories with other parties," said Khan.
Targeting the other politicians, Khan said that the government has started seizing their undeclared properties. He claimed that these leaders have looted the country when they were in power.
"We have started seizing their undeclared properties; the billions they have taken overseas, we are in talks with other governments to bring that looted wealth back to Pakistan," he said.
"The ones who have been sitting in power and looting the country; but let me say it again, that despite the messages even from the outside that you are having sent to me, we will not let accountability go. On the other side, we have secular Bilawal Bhutto who has joined them. And then PML-N who have no idea what they themselves are have also joined them. They just want to hear three letters," he added.
Meanwhile, Khan is scheduled to meet US President Donald Trump at the White House tomorrow. He will be accompanied by Pakistan Army chief and Lieutenant General Hameed.