Wot ye not— i.e.. Knew ye not. Wot, is an old English word, the preterite of weet, to know, though itself often used for the present. It is of Saxon original.
Related Commentaries of Genesis 44:15
Genesis 44:15
15 And Joseph said unto them, What deed is this that ye have done? wot ye not that such a man as I can certainly divine?