Matthew 7:16–20

[16] You will recognize them by their fruits. Are grapes gathered from thornbushes, or figs from thistles? [17] So, every healthy tree bears good fruit, but the diseased tree bears bad fruit. [18] A healthy tree cannot bear bad fruit, nor can a diseased tree bear good fruit. [19] Every tree that does not bear good fruit is cut down and thrown into the fire. [20] Thus you will recognize them by their fruits. (ESV)