Did God ever say that His Word would be corrupted or preserved from generation to generation?
Proverbs 30:32 (KJV) 32 If thou hast done foolishly in lifting up thyself, or if thou hast thought evil, lay thine hand upon thy mouth.
Proverbs 30:20 (KJV) 20 Such is the way of an adulterous woman; she eateth, and wipeth her mouth, and saith, I have done no wickedness.
Proverbs 30:5,6 (KJV) 5 Every word of God is pure: he is a shield unto them that put their trust in him. 6 Add thou not unto his words, lest he reprove thee, and thou be found a liar.