Saddhammappatirūpakasutta

sn16.13:3.1 It’s not the elements of earth, water, fire, or air that make the true teaching disappear.

sn16.13:3.2 Rather, it’s the futile people who appear right here that make the true teaching disappear.

sn16.13:3.3 The true teaching doesn’t disappear like a ship that sinks all at once.