Deuteronomy 4:2

What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.

Add thou not unto his words, lest he reprove thee, and thou be found a liar.

Only be thou strong and very courageous, that thou mayest observe to do according to all the law, which Moses my servant commanded thee: turn not from it to the right hand or to the left, that thou mayest prosper whithersoever thou goest.

For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.

Brethren, I speak after the manner of men; Though it be but a man’s covenant, yet if it be confirmed, no man disannulleth, or addeth thereto.

Let us hear the conclusion of the whole matter: Fear God, and keep his commandments: for this is the whole duty of man.

Ye have heard that it hath been said, Thou shalt love thy neighbour, and hate thine enemy.