'Sworn' in the Bible

and therefore I have sworn to the house of Eli: the iniquity of the house of Eli is not atoned for, by sacrifice, and by offering -- unto the age.'

and Jonathan saith to David, 'Go in peace, in that we have sworn -- we two -- in the name of Jehovah, saying, Jehovah is between me and thee, and between my seed and thy seed -- unto the age;' and he riseth and goeth; and Jonathan hath gone in to the city.