| LLL V.ii.245 | [masked Longaville to masked Katharine] You have a double tongue within your mask [i.e. deceitful] |
| MND II.ii.9 | [First Fairy singing] You spotted snakes with double tongue |
| MND III.ii.72 | [Hermia to Demetrius] with doubler tongue / Than thine, thou serpent, never adder stung |
| R2 III.ii.21 | [King Richard to the earth, of an adder] Whose double tongue may with a mortal touch / Throw death upon thy sovereign's enemies |