A bench of Acting Chief Justice Gita Mittal and Justice C Hari Shankar said the appeal filed by Kejriwal and AAP leader Ashutosh against the July 26 decision of a single judge was "misconceived and is devoid of merit".
"Hence the appeal is dismissed. They (AAP leaders) should not have filed this," the bench said.
The high Court observed that expedition of trial is the "need of the hour" and recommended the same in all cases.
The court also noted that the AAP leaders had admitted that disparaging remarks had been made by lawyer Ram Jethmalani during cross examination of Jaitley.
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It had said that the court had to answer the apex court on delay in trials.
The court had on July 26 directed the joint registrar to expedite the recording of evidence in the civil defamation suit while disposing of an application filed by Jaitley.
They had accused the BJP leader of corruption as the president of the Delhi and District Cricket Association (DDCA), a post he had held from 2000 to 2013.
Jaitley, who denied all the allegations levelled by the AAP leaders in December 2015, had claimed that they made "false and defamatory" statements in the case involving the DDCA, thereby harming his reputation.
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