| 2H6 V.i.182 | [Salisbury to King] It is great sin to swear unto a sin |
| AYL V.iv.98 | [Touchstone to Jaques, of two quarrellers] they shook hands and swore brothers [i.e. pledged themselves to act as brothers] |
| Mac IV.ii.48 | [Macduff's wife to her son, in answer to 'What is a traitor?'] one that swears and lies [i.e. takes an oath and breaks it] |