'Sworn' in the Bible

And therefore I have sworn unto the house of Eli that the iniquity of Eli's house shall not be expiated with sacrifice or oblation for ever.

And Jonathan said to David, Go in peace, forasmuch as we have both of us sworn in the name of Jehovah, saying, Jehovah be between me and thee, and between my seed and thy seed for ever! And he arose and departed; and Jonathan went into the city.