Changing the wordings of Adhan

Q 7: Is it permissible for the Mu'adhin (caller to Prayer) of a Masjid (mosque) to say "Come to Salah (success)" instead of "Come to Salah (Prayer)" in the Adhan (Call to Prayer)?

A: If the Mu'adhin says, "Come to success" instead of "Come to Prayer", his Adhan is invalid, as he has replaced a Mashru` (Islamically acceptable) word by another, so the Adhan is incomplete and invalid. Such a Mu'adhin should be prevented from pronouncing the Adhan.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.