Yes, it does. Deuteronomy 13:1 says:
"All this word which I command you, that shall ye observe to do; thou shalt not add thereto, nor diminish from it."
This is the assurance that the Torah (i.e. the 5 Books of Moses), the Word of the living G-d, are forever unchanged; that, and the incredible safeguards taken by scribes to ensure that no mistakes are made. My brother is a scribe, and I am very familiar with the requirements. But don't take my word for it - the fact is that the portions of the Torah discovered at Qumran (the Dead Sea scrolls) are identical to modern Torahs. Further, every Torah is identical anywhere in the world, regardless of the denomination of the synogogue that owns it.
Deuteronomy 13
1. If a prophet, or one who foretells by dreams, appears among you and announces to you a miraculous sign or wonder,
2. and if the sign or wonder of which he has spoken takes place, and he says, "Let us follow other gods" (gods you have not known) "and let us worship them,"
3. you must not listen to the words of that prophet or dreamer. The LORD your God is testing you to find out whether you love him with all your heart and with all your soul.
4. It is the LORD your God you must follow, and him you must revere. Keep his commands and obey him; serve him and hold fast to him.
Deuteronomy 12:32
See that you do all I command you; do not add to it or take away from it.