We use a Randomized Controlled Trial in Pakistan to test whether one-on-one engagement with community religious leaders can encourage them to advise congregants to comply with public health guidelines from state authorities. We test whether religious content in this engagement increases its effectiveness. We find that simple one-on-one engagement significantly improves the advice given by religious leaders to congregants on preventing COVID transmission in the mosque. Engagement was equally effective with or without explicitly religious content. Treatment effects are driven by the subsample who are already convinced of basic information about COVID at baseline, suggesting the treatment does not work by correcting basic knowledge about the disease. Rather, it may work through the effectiveness of one-on-one engagement that reinforces existing knowledge and connects it to actions that respondents can take in their role as community leaders.