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.
They said to him, "Why does my lord speak such words as these? Far be it from your servants to do such a thing.
But he said, "Far be it from me to do this. The man in whose possession the cup has been found, he shall be my slave; but as for you, go up in peace to your father."
May it never be! Rather, let God be found true, though every man be found a liar, as it is written, "THAT YOU MAY BE JUSTIFIED IN YOUR WORDS, AND PREVAIL WHEN YOU ARE JUDGED."
May it never be! For otherwise, how will God judge the world?
Do we then nullify the Law through faith? May it never be! On the contrary, we establish the Law.