13 years behind bars for Mohammed Haji Sadiq.
He was found guilty of 14 offences of child sex abuse last month.
The offences, involving four victims, occurred between 1996 and 2006 and took place within the Madina Mosque in Cardiff.
Detective Chief Inspector Rob Cronick of South Wales Police said: "Mohammed Sadiq abused his position of trust within the community he served.
"Last month's verdict shows the magnitude of Sadiq's offending and the devastating effect this has had on his victims.
"These four young women have shown immense courage in coming forward and telling us about the abuse they suffered and enduring the further anguish of a crown court trial.
"As a result of the verdict and today's sentence I believe there may be members of the community who may now feel confident enough to speak to the police or our support agencies.
"Anyone with any information concerning this matter or who may have any other concerns should call a dedicated NSPCC helpline on 0808 800 5000 where specially trained staff will talk to you and offer support.
"Alternatively you can call South Wales Police on 101 quoting the reference: 1600442164.
"Investigating sexual violence is a priority for South Wales Police and may I provide reassurance that all allegations of non-recent sexual abuse will be investigated.
"There are also a number of support agencies available to anyone who wishes them to be their point of contact if they have any concerns. South Wales Police can sign post victims directly to them.
"Our priority is to keep victims, and potential victims safe. We are committed to helping the vulnerable and have dedicated teams to help and support anyone who may have been affected by this investigation or any other circumstance".