James 3:12

My brothers, can a fig tree produce olives or a grapevine [produce] figs? Neither can a salt water [spring] produce fresh water.

Matthew 7:16-20

You can recognize them by their fruit [i.e., by what their lives produce]. Do people harvest grapes from thorn bushes, or figs from thistle weeds?

Matthew 12:33

Either be a healthy tree and produce wholesome fruit, or be a diseased tree and produce rotten fruit, for [the quality of] a tree will be recognized by [the quality of] its fruit.

Luke 6:43-44

For there is no healthy tree that produces bad fruit; nor is there a diseased tree that produces wholesome fruit.

Romans 11:16-18

And if the first part of the dough is dedicated to God, the entire batch of dough will be also. And if the roots [of a tree] are dedicated to God, the branches will be also.

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 can recognize them by their fruit [i.e., by what their lives produce]. Do people harvest grapes from thorn bushes, or figs from thistle weeds?
Matthew 12:33
Either be a healthy tree and produce wholesome fruit, or be a diseased tree and produce rotten fruit, for [the quality of] a tree will be recognized by [the quality of] its fruit.
Luke 6:43
For there is no healthy tree that produces bad fruit; nor is there a diseased tree that produces wholesome fruit.
Romans 11:16
And if the first part of the dough is dedicated to God, the entire batch of dough will be also. And if the roots [of a tree] are dedicated to God, the branches will be also.