The deepest rivers flow with the least noise.

Altissima quæque flumina minimo sono labuntur.

Original text (Latin)

Notes from Wikiquote

4, 13. | H. T. Riley (ed.) Dictionary of Latin Quotations (London: Henry G. Bohn, 1856) p. 17

'sound' not 'noise'

Quote text and notes from Wikiquote: Quintus Curtius Rufus (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.