Nawaz Sharif's daughter Maryam Nawaz also tweeted about Begum Kulsoom Nawaz.
Recent opinion polls suggest PML-N has lost its lead nationally to the Pakistan Tehreek-e-Insaf (PTI) party of arch-rival Khan, whose anti-corruption message has resonated with many Pakistanis.
"I have to tell the Pakistani nation that I am doing this for them".
Asking the people for their support, he said the destiny of the country can change if the masses stay by his side as such opportunities do not come often.
NAB Rawalpindi has asked for and got ten woman police personnel from Pakistan's Punjab province, but sources told The News that it is still highly unlikely Maryam would be lodged at NAB's police station at the Rawalpindi bureau, where her father will most likely be taken.
Ousted Pakistani prime minister Nawaz Sharif and his daughter Maryam arrived at the Abu Dhabi airport earlier Friday morning from London.
Hussain Nawaz was talking to media about her mother's current condition, he said, "After exactly one month, she [my mother] has opened her eyes". Don't know if she saw or registered us. Still not conscious and on the ventilator.
Sharif alleges the military is aiding a "judicial witchhunt" against him and his PML-N party.
"Everyone is involved in this blatant rigging from the caretaker Punjab chief minister to the caretaker interior minister and police officials", the PML-N president asserted, as he warned the officials concerned of "fair judgement" if the PML-N is voted to power again.
An accountability court has awarded 10 years to Mr Sharif and eight to his daughter in the Avenfield corruption reference verdict. Another 100 PML-N workers have been placed under house arrest in Rajanpur.
Muhammad Mehdi, the party's media coordinator, told Reuters that almost 500 workers had been detained in a "massive crackdown", including raids on the homes of a number of some of the party's local councillors.
"Section 144 has been imposed for us while Imran Khan has been permitted to hold a rally in Defence Housing Authority", he said, adding, "You can do all the rigging you want, we will still win the July 25 polls".
Mr Sharif was sentenced by a court in Islamabad last week over the purchase of high-end properties in London.