Are God and Heaven eternal and/or everlasting?


I understand that it is not clear that hell is eternal or everlasting, but (and perhaps I missed something), where in the Bible do we unambiguously learn that God AND heaven are necessarily :
a.) eternal OR
b.) everlasting?


Note: “firedup” created another thread with the same question here. Please direct replies there, and reserve this thread for Tom’s own replies (if any) to fu’s question.


You for Mr. Pratt for your clarification on the best way for those other than Mr. Talbott to reply to my post above. I agree.