Uh huh. Well I read your source and I am unable to find this quote, or anything that supports your original claim. Maybe I am overlooking it? Could you please copy and paste the “words that he said with his mouth” so I can see for myself? Maybe I am too dumb to find them (probable).

I am asking in good faith since I don’t want to ascribe blind loyalty to events that do not reflect reality.

Edit: video from an interview would work too.

Edit 2:

I feel good and all I can say is, watch me, you’ll see,” [Biden] told the AP at the time. “It doesn’t mean I would run a second term. I’m not going to make that judgment at this moment.

There’s no quote from Biden (aka ‘his words’) in the article you linked saying he’ll be a 1 term president. That’s reality.