Luke 6:43-45

6:43 “For no good tree bears bad fruit, nor again does a bad tree bear good fruit, 6:44 for each tree is known by its own fruit. For figs are not gathered from thorns, nor are grapes picked from brambles. 6:45 The good person out of the good treasury of his heart produces good, and the evil person out of his evil treasury produces evil, for his mouth speaks from what fills his heart.

James 3:12

3:12 Can a fig tree produce olives, my brothers and sisters, or a vine produce figs? Neither can a salt water spring produce fresh water.