given by the Buddha given to the Kalama people:
Do not go by
Do not go by tradition;
Do not go by hearsay;
Do not go on the authority of sacred texts;
Do not go on the grounds of pure logic;
Do not go by a view that seems rational;
Do not go by reflecting on mere appearances;
Do not go along with a considered view because you agree with it;
Do not go along on the grounds that the person is competent;
Do not go along because [thinking] 'the recluse is our teacher'.
Kalamas, when you yourselves know: 'These things are unwholesome,
these things are blameworthy; these things are censured by the wise;
and when undertaken and observed, these things lead to harm and
ill, abandon them...
Kalamas, when you know for yourselves: These are wholesome; these
things are not blameworthy; these things are praised by the wise;
undertaken and observed, these things lead to benefit and happiness,
having undertaken them, abide in them.
See for more context: Wikipedia