This is an unhappy expression, bringing in the name of God where it does not occur. In the O.T. it is chalilah, 'far be it.' Ge 44:7,17, etc. In the N.T. ?? ???????, 'let it not be.' Ro 3:4,6,31, etc.
God must prove true, though every man prove a liar! As Scripture says of God-'That thou mayest be pronounced righteous in what thou sayest, and gain thy cause when men would judge thee.'