'Add' in the Bible

Ye shall not add unto the word which I command you, neither shall ye diminish from it, that ye may keep the commandments of Jehovah your God which I command you.

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

if thou shalt keep all this commandment to do it, which I command thee this day, to love Jehovah thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, besides these three: