Deputy Finance Minister Ahmad Maslan today advised Perlis mufti Mohd Asri Zainul Abidin and academician Mohamad Agus Yusof to learn more about the goods and services tax (GST) before calling him "stupid".

"I want to recommend Agus and Asri to learn more about the GST before calling me stupid," he said at a press conference in Permatang Pauh today.