A doctor has denied over-prescribing morphine to children at a NSW yoga ashram where he lived.

An ashram should not be held responsible for abuse inflicted on children by its former spiritual leader and his second-in-command, two yoga devotees have told a royal commission.

Muktimurti, a longtime resident of the Mangrove Yoga Ashram on the NSW Central Coast, said on Tuesday she did not know if physical and sexual abuse as alleged by former child residents had taken place.

Muktimurti said she did not really believe the allegations against ashram leader Swami Akhandananda when he was brought to trial.

She said in her statement to the commission she found it "morally questionable" for victims to now seek financial compensation.

"I don't agree with the ashram being held to ransom for something that none of us in the ashram community have anything to do with," she said.

Muktimurti said she believed compensation would imply the ashram had done something wrong.

Akhandananda, who has since died, was jailed in 1989 for abusing four girls.

The sex abuse royal commission has heard from nine witnesses who have described shocking sexual abuse by the swami and physical abuse by his second in charge, a woman known as Shishy, in the 1970s and 80s.

Muktimurti lived at the ashram from 1978 to 1996 and is back there in an administrative position.

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NSW ashram 'not to blame' for abuse