Authors:

You must not think, sir, to catch old birds with chaff.

Miguel de Cervantes Saavedra, Quixote de la Mancha (don, fict.name.) (1847). “The history of don Quixote de la Mancha. From the Span. To which is prefixed a sketch of the life and writings of the author. Select libr. ed”, p.124
You must not think, sir, to catch old birds with chaff.