In a surprise move on Sunday, the Supreme Court of Pakistan took suo-motu notice of the letter by the six judges of the Islamabad High Court on Monday and formed a larger bench to hear the case.
The seven-member bench will be headed Justice Qazi Faez Isa.
The bench also includes Justice Mansoor Ali Shah, Justice Jamal Mandokhail, Justice Yahya Afridi, Justice Musarrat Hilali, Justice Athar Minallah and Justice Naeem Afghan.
The notice comes soon after the government set up a judicial commission under Justice (r) Tassaduq Hussain Jilani to probe the allegations made by the IHC judges.
The commission had been formed after CJP Isa and Justice Mansoor Ali Shah met Prime Minister Shehbaz Sharif and Law Minister Azam Tarar.
Prior to the meeting, a full court meeting had taken place in the Supreme Court as well.
However, over 300 lawyers across the country had asked the SC to take suo motu notice of the matter under Article 184(3) calling it a matter of public importance.