'Add' in the Bible

Which of you by taking thought can add one cubit unto his stature?

And which of you with taking thought can add to his stature one cubit?

The one preach Christ of contention, not sincerely, supposing to add affliction to my bonds:

And beside this, giving all diligence, add to your faith virtue; and to virtue knowledge;

For I testify unto every man that heareth the words of the prophecy of this book, If any man shall add unto these things, God shall add unto him the plagues that are written in this book: