Sharif had written to the Punjab Home Secretary seeking extension of his stay abroad for his medical treatment following the end of his four-week permission for the purpose.
"Nawaz Sharif said these demands or conditions are illegal and can't be met in the presence of court guarantees (which have) already (been) submitted to it (the court) with regard to his bail," the insider said.
The former prime minister was shifted to an intensive care unit (ICU) set up at his Jati Umra residence after his two-week stay at the Services Hospital for treatment of multiple diseases.
Sharif, who was admitted to Lahore's Services Hospital on October 22, is being treated under the supervision of the special medical board of the hospital.
Geo News reported that the former Prime Minister's health had deteriorated since he was rushed to Services Hospital earlier this week with critically low platelet count in his blood.
The news was shared by Sharif's personal physician Dr Adnan Malik who after meeting the stalwart in Adiala jail took to Twitter stating that the former prime minister's health required immediate in-hospital care.
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.
Terming the jail authorities as "oppressors", she alleged that they could mix anything in her father's food and warned them of not taking her threat lightly.
Maryam showed a discharge certificate which highlighted that the former Prime Minister had suffered a heart attack last July and that the government, along with jail authorities, had been negligent, according to The Express Tribune.
"Imran Khan is a player who will soon be thrown out of the stadium by spectators. His Bani Gala residence is in the midst of corruption. He should be ashamed of himself," Geo News quoted Sharif as saying