No viper so little but hath its venom. [ Proverb ]

But through the heart
Should Jealousy its venom once diffuse
'Tis then delightful misery no more
But agony unmixed, incessant gall
Corroding every thought, and blasting all
Love's paradise. [ Thomson ]

The venom clamours of a jealous woman
Poison more deadly than a mad-dog's tooth. [ William Shakespeare ]

The more hidden the venom, the more dangerous it is. [ Marguerite de Valois ]

The venom of a viperous tongue may be converted into treacle. [ Proverb ]

We instinctively abhor calumny as we do a snake, for fear of its venom; but, is our aversion to it so great when it attacks others? [ De Finod ]

O jealousy, thou ugliest fiend of hell! thy deadly venom preys on my vitals, turns the healthful hue of my fresh cheek to haggard sallowness, and drinks my spirit up. [ Hannah More ]