“Smooth are his words, his voice as honey sweet,
Yet war is in his heart, and dark deceit!”
'The Stray Cupid', tr. R. Polwhele, lines 14–15
Compare: "The words of his mouth were smoother than butter, but war was in his heart: his words were softer than oil, yet were they drawn swords." Psalm 55:21 (KJV)
The Idylliums of Moschus, Idyllium I