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 say these things? Far be it from your servants to do such a thing!
But [Joseph] said, God forbid that I should do that; but the man in whose hand the cup is found, he shall be my servant; and as for [the rest of] you, arise and go in peace to your father.
By no means! Let God be found true though every human being is false and a liar, as it is written, That You may be justified and shown to be upright in what You say, and prevail when You are judged [by sinful men].
By no means! Otherwise, how could God judge the world?
Do we then by [this] faith make the Law of no effect, overthrow it or make it a dead letter? Certainly not! On the contrary, we confirm and establish and uphold the Law.