jub - Exodus:4:22-23

jub@Exodus:4:22 @ And thou shalt say unto Pharaoh, The LORD hath said thus: Israel [is] my son, [even] my firstborn.

jub@Exodus:4:23 @ And I have said unto thee, Let my son go that he may serve me, but thou hast refused to let him go; [therefore], behold, I [will] slay thy son, [even] thy firstborn.