父は、時は金なり、とよく言っていた。

、、。

My father often used to say, 'Time is money.'

Literal

Father [topic-は], time [topic-は] money is, [quotative-と] often was-saying.

と marks direct quotation, embedding the proverb inside a speech report. よく言っていた ('often used to say') uses the habitual past. The classical なり in the proverb contrasts with the casual spoken frame around it.