"I am sorry but this reflected the lowest point in the history of modern Supreme Court. I am pained," Justice D Y Chandrachud, who was part of the three-judge bench, said.
The observation came when senior advocate Vikas Singh said it was "slip of the tongue" and he has apologised before anybody could notice it.
However, the bench, headed by Justice Dipak Misra, said, "Decorum of the court should not be spoilt".
At this stage, Attorney General Mukul Rohatgi said "cases come and go, but dignity should be there".
Senior advocate Kapil Sibal said he was apologising on behalf of the bar.
During the hearing on January 20 in the case, the court had witnessed a piquant situation when the senior advocate used an unparliamentary word while assailing the verdict, evoking a sharp reaction from the bench which not only reprimanded him but barred him from advancing arguments on that day.