'Sweareth' in the Bible

And Saul hearkeneth to the voice of Jonathan, and Saul sweareth, 'Jehovah liveth -- he doth not die.'

And David sweareth again, and saith, 'Thy father hath certainly known that I have found grace in thine eyes, and he saith, Let not Jonathan know this, lest he be grieved; and yet, Jehovah liveth, and thy soul liveth, but -- as a step between me and death.'

And David sweareth to Saul, and Saul goeth unto his house, and David and his men have gone up unto the fortress.

And Saul sweareth to her by Jehovah, saying, 'Jehovah liveth, punishment doth not meet thee for this thing.'