The Religious Affairs Ministry issued a notice on Sunday in this regard.
The ministry has issued such notices at different times making it compulsory to wear masks at all religious sites, it said.
But it is a matter of great concern that the people have recently slackened in their use of masks, it said.
“So, fresh instructions have been issued to ensure maintaining social distance, proper health guidelines and wearing masks at religious sites," the notice said.
“No mask, no service”- the prime minister's dictum from last week directed at government service providers, should be widely promoted to raise awareness among people, Ministry said.
Also read: No mask, no govt service: Cabinet Secretary
All places of worship including mosques, temples and churches have been requested to announce the directives regularly through their loudspeakers or megaphones, it added.
Earlier on October 25, seeing many people have become reluctant to wear face masks despite the prevalence of Covid-19, the government decided it would deny its services to those seeking them without wearing a mask.
Also read: 'Face mask will be mandatory before a vaccine arrives'
“Instructions have been given at all-levels, to all of our institutions -- social, organizational or formal institutions-- that no mask, no service. Masks must be used in all institutions, haats, markets, shopping malls, schools, and social and religious gatherings. We’ve made it compulsory,” Cabinet Secretary Khandker Anwarul Islam said.
He was briefing journalists after the weekly Cabinet meeting.
Also read: Covid-19 claims 18 more lives, infects 1,474 in Bangladesh