i.e. I will punish him severely for it, as this phrase is taken, Genesis 9:5, Genesis 42:22. The sad effect of this threatening the Jews have felt for above sixteen hundred years together.
Related Commentaries of Deuteronomy 18:19
Deuteronomy 18:19
19 And it shall come to pass, that whosoever will not hearken unto my words which he shall speak in my name, I will require it of him.