Brothers (I speak according to man), if a man’s testament has been confirmed, no one would reject it or add to it
Other versions
King James Version
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. English Standard Version
To give a human example, brothers: even with a man-made covenant, no one annuls it or adds to it once it has been ratified.New International Version
Brothers, let me take an example from everyday life. Just as no one can set aside or add to a human covenant that has been duly established, so it is in this case.