'Add' in the Bible

You shall not add to the word which I am commanding you, nor take away from it, so that you may keep the commandments of the Lord your God which I am commanding you.

“Everything I command you, you shall be careful to do it; you shall not add to it nor take away from it.

if you keep and carefully observe all these commandments which I am commanding you today, to love the Lord your God, and to walk [that is, to live each and every day] always in His ways—then you shall add three more cities [of refuge] for yourself, besides these three,