。
She used to often quote from the Bible.
Literal
[topic-は] often Bible [from-から] quoted [used-to-ものだ].
~から marks the source of a quotation — 聖書から引用する ('quote from the Bible'). 引用 is a Sino-Japanese compound (引 'pull' + 用 'use') meaning 'citation, quotation' — pairs with する as 引用する ('to quote, cite'). 聖書 is the standard Japanese name for the Bible, with the kanji literally meaning 'sacred/holy book.' Christianity's history in Japan is fraught — introduced in the 16th century, banned and persecuted for over two centuries, then reintroduced after the Meiji Restoration — and today remains a small minority religion.