Prayer in the new mosque and in the old mosque

Question

In a small town of the 24 Parganas district there was, from about a hundred and fifty years ago, a small congregational (jami‘) mosque, in which only about 20–22 worshippers pray. After that, about a hundred years ago, a landowner, seeing that this mosque was small and the worshippers could not manage in it, made a waqf in the name of the mosque of one hundred bighas (a local unit of land area) of paddy land and an upper storey; and it is very large, magnificent, “of five gaz (a unit of length, about a yard, ≈ 0.

Answer

A place that has once been made a mosque in the Shar‘i manner, and where the adhan and congregational prayer have begun, becomes a mosque for ever, whether it is small or large. When the new mosque was built, then in it too the adhan, the congregation — everything is valid.

Source: Fatawa Mahmudiyya

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