John Gill Commentary Genesis 44:7

"And they said unto him, Wherefore speaketh my lord such words as these? Far be it from thy servants that they should do such a thing." — Genesis 44:7 (ASV)

And they said to him, why says my lord these words ?
&c.] One of them, in the name of the rest, perhaps Judah, made answer, as astonished at the charge laid against them, suggesting that there was not the least foundation for it, and were quite surprised to hear anything of this kind alleged against them: God forbid that your servants should do according to this thing ;
expressing the utmost detestation of such a fact, as being what they could never be guilty of.