You may be looking for:

• Wikipedia:Manual of Style/Biographies – contains guidance on whether to list a person's religion
• Wikipedia:Manual of Style/Capital letters § Religions, deities, philosophies, doctrines, and their adherents – shortcut: MOS:ISMCAPS
• Wikipedia:Manual of Style/Philosophy – failed proposal
• Wikipedia:Manual of Style/Titles#Scripture

Religion- or culture-specific

• Wikipedia:Manual of Style/Islam-related articles
• Wikipedia:Manual of Style/Latter Day Saints
• Wikipedia:Manual of Style/New religious movements

• Wikipedia:Myth versus fiction
• Wikipedia:WikiProject Religion/Manual of style
• Wikipedia:WikiProject Judaism/Manual of Style

• Wikipedia:WikiProject Religion
• Wikipedia:Neutral point of view – policy; covers religious bias in article content
• Wikipedia:Systemic bias – essay; covers religious bias in coverage generally
• Wikipedia:Biographies of living persons § Categories, lists and navigation templates – policy; covers categorization by religion
• Wikipedia:What Wikipedia is Not § Wikipedia is not a soapbox – policy; covers religious promotion/opposition
• Wikipedia:Fringe theories – guideline may cover some faith-based arguments against science, though not disputes between faiths
• Wikipedia:Religion – failed policy proposal (2012)

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