References in classic literature ?
Nay, it would ill become me to cast a slur upon a lady who is both my guest and the wife of my comrade-in-arms," said the Seneschal of Villefranche.
The metaphor irritated Philip, because it assumed for the speaker a romantic attitude and cast a slur upon the position which Philip instinctively felt had more to say for it than he could think of at the moment.