James 3:12

can a fig-tree, my brethren, produce olives, or a vine figs? no more can the sea yield water that is fresh.

Matthew 7:16-20

you will know them by their fruits: do men gather grapes of thorns,

Matthew 12:33

Either allow the tree to be good, and its fruit good; or else say the tree is corrupt, and its fruit corrrupt: for a tree is distinguished by its fruit.

Luke 6:43-44

Certainly a good tree does not produce bad fruit: nor does a bad tree produce good fruit.

Romans 11:16-18

Now if the first-fruits be holy, so is the whole product: and if the root be holy, so are the branches.

Treasury of Scripture Knowledge

Summary

Can the fig tree, my brethren, bear olive berries? either a vine, figs? so can no fountain both yield salt water and fresh.

Bible References

The fig tree

Matthew 7:16
you will know them by their fruits: do men gather grapes of thorns,
Matthew 12:33
Either allow the tree to be good, and its fruit good; or else say the tree is corrupt, and its fruit corrrupt: for a tree is distinguished by its fruit.
Luke 6:43
Certainly a good tree does not produce bad fruit: nor does a bad tree produce good fruit.
Romans 11:16
Now if the first-fruits be holy, so is the whole product: and if the root be holy, so are the branches.