Is it permissible for a woman to falsely swear that she did not carry the knife to strike her husband, even though she did, in order to preserve her right to the dower?

A woman possesses the full dowry upon consummation, and half of it with a valid contract before consummation, as Allah the Almighty says: "And if you divorce them before you have touched them and you have already specified for them an obligation, then [give them] half of what you specified – unless they forgo it or the one in whose hand is the marriage contract forgoes it. And to forgo it is closer to righteousness. And do not forget graciousness between you."

If no dowry was specified for her and she was divorced before consummation, she is entitled to a gift (mut'ah) in accordance with what is customary, as Allah the Almighty says: "O you who have believed, when you marry believing women and then divorce them before you have touched them, then there is not for you any waiting period to count concerning them. So provide for them and release them with a gracious release." This right is established for the woman and is not forfeited by the husband's claim that she attempted to kill him. The relationship between the oath and the dowry is not clear.