James 3:12
Can a fig-tree, my brethren, yield olives, or a vine yield figs? No; and neither can salt water yield sweet.
Matthew 7:16-20
By their fruits you will easily recognize them. Are grapes gathered from thorns or figs from brambles?
Matthew 12:33
"Either grant the tree to be wholesome and its fruit wholesome, or the tree poisonous and its fruit poisonous; for the tree is known by its fruit.
Luke 6:43-44
"There is no good tree that yields unsound fruit, nor again any unsound tree that yields good fruit.
Romans 11:16-18
Now if the firstfruits of the dough are holy, so also is the whole mass; and if the root of a tree is holy, so also are the branches.