'Sworn' in the Bible

"{How} can I forgive you? Your children have forsaken me, and they have sworn by [those who are] not gods. But I fed them to the full, and they committed adultery, and flocked [to] the house of a prostitute.

For I have sworn by myself," {declares} Yahweh, "that Bozrah will become as a horror, as a disgrace, as a waste, and as a curse. And all her towns will be {everlasting sites of ruins}."

Yahweh of hosts has sworn by himself, "Surely I will fill you [with] troops like the creeping locusts, and they will sing over you a war cry."