The Muslim parties on Thursday took a U-turn on questioning the authorship of the 2003 report of the Archaeological Survey of India (ASI) and apologised to the Supreme Court for wasting it's time in the Ayodhya land dispute case.

A five-judge constitution bench headed by Chief Justice Ranjan Gogoi was told by senior advocate Rajeev Dhavan that they do not wish to question the authorship of the summary of the ASI report.

"It is not expected that every page is to be signed. The authorship of the report and the summary need not be questioned. If we had wasted my lords time, then we apologise for that. There is no point going into that.

"The report in question has an author and we are not questioning the authorship," Dhavan, representing the Muslim parties, said.

On Wednesday, senior advocate Meenakshi Arora, also representing the Muslim parties, questioned the ASI report saying every chapter is attributed to an author but the summary has not been attributed to anyone.

The bench also comprising Justices S A Bobde, DY Chandrachud,  Ashok Bhushan and S Abdul Nazeer said that Dhavan in his opening remark has said that he has not forfeited his right to question the report but the evidences cannot be discredited after being accepted by the court.

At the outset, the bench asked both Hindu and Muslim parties to specify the time frame for completing the argument saying that there will not be any extra day after October 18.

"There will not be any extra day after October 18. It will be miraculous, if we deliver the judgement in four weeks in the matter," Chief Justice Gogoi said.

The court asked the Muslim parties to wrap up their arguments on the ASI report during the course of the day.

It said there are holidays in October and only one advocate of the four Hindu parties will be allowed to give rejoinder arguments.