John 14:23 and John 14:1-4-the words abode and mansion/house are actually the noun form of "abide" in John 15 etc.
John 14:1 - 4
ESV - 1 Let not your hearts be troubled. Believe in God; believe also in me. 2 In my Father's house are many rooms. If it were not so, would I have told you that I go to prepare a place for you?
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
My opinion is that if Christ had not ascended, would there have been "a place" at all? He has gone with a human body, which must be somewhere. And we may even say that His ascending up on high has made a place where His servants will be.