Luke 6:43-45

43“A good tree can’t produce bad fruit, and a bad tree can’t produce good fruit.

44A tree is identified by its fruit. Figs are never gathered from thornbushes, and grapes are not picked from bramble bushes.

45A good person produces good things from the treasury of a good heart, and an evil person produces evil things from the treasury of an evil heart. What you say flows from what is in your heart.