مَنْ بَنَى لِلَّهِ مَسْجِدًا، بَنَى اللَّهُ لَهُ بَيْتًا فِي الْجَنَّةِ
Translation: Whoever builds a mosque for Allah, Allah builds a house for that person in Paradise.
Source: البخاري ومسلم
بَنَى is a past-tense verb meaning “built.” مَسْجِدًا names what the person builds; بَيْتًا فِي الْجَنَّةِ describes the promised response. A key phrase is لِلَّهِ: the building is for Allah’s pleasure, not fame or rivalry.
A mosque serves worship, communal prayer, and religious learning. Supporting its construction benefits the community. Caring for the building afterward—keeping it clean and safe, using it appropriately, and respecting neighbors—is also part of responsible stewardship.