Matthew 7:17-20

7:17 In the same way, every good tree bears good fruit, but the bad ¹  tree bears bad fruit. 7:18 A good tree is not able to bear bad fruit, nor a bad tree to bear good fruit. 7:19 Every tree that does not bear good fruit is cut down and thrown into the fire. 7:20 So then, you will recognize them by their fruit.

[7:17]  ¹ tn Grk “rotten.” The word σαπρός, modifying “tree” in both v. 17 and 18, can also mean “diseased” (L&N 65.28).