How about god ? Does he ever change?
Num 23:19: God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?
And the man that committeth adultery with another man's wife, even he that committeth adultery with his neighbor’s wife, the adulterer and the adulteress shall surely be put to death.
And the scribes and Pharisees brought unto him a woman taken in adultery; and when they had set her in the midst, They say unto him, Master, this woman was taken in adultery, in the very act. Now Moses in the law commanded us, that such should be stoned: but what sayest thou? This they said, tempting him, that they might have to accuse him. But Jesus stooped down, and with his finger wrote on the ground, as though he heard them not. So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first cast a stone at her.
Now let us see. Originally, god said if you commit adultery you will be killed. Then he said, you cannot kill them unless you have never committed any sins yourself. Now, that limitation was not there initially and gods law originally said they should be killed. Now it is different and they are not to be killed. So, unless the meaning of the word killed has been changed, his law has changed.
The bible even says that the laws will be changed. "For when the priesthood is changed, of necessity there takes place a change of law also." Hebrews 7:12.