No, because he never said it directly just hinted at it:

• Biden Suggests He Would Only Serve One Term if Elected President

Asked in October if he would only serve one term if elected, the former vice president told the Associated Press that he wouldn’t make that promise but he wasn’t deeply committed to seeking a second term.

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

However there were several advisors on his campaign that said it:

“If Biden is elected, he’s going to be 82 years old in four years and he won’t be running for reelection,” a prominent adviser to the campaign told Politico.

• Source: Poll: Women drive big advantage for Harris among young voters, with men divided

“Harris has a significant lead among young registered voters in the NBC News Stay Tuned Gen Z Poll powered by SurveyMonkey. But a yawning gender gap is dividing Gen Z.”

That being said, we all know how inaccurate polls can be sometimes.