Trump made the remark at an October, 18 2020 rally in Carson City, Nevada.

He will surrender your future to the virus. He’s going to lockdown. This guy wants to lockdown. He’ll listen to the scientists. If I listened totally to the scientists, we would write down, have a country that would be in a massive depression.

Opponent Joe Biden responded on Twitter.

Axios – Trump says if Biden’s elected, “he’ll listen to the scientists”
The Hill – Trump: Biden will ‘listen to the scientists’ if elected
CBS News – Trump slams Biden for listening to scientists as COVID-19 hospitalizations rise