James 3:12

A fig tree is not able, my brothers, to produce olives, or a grapevine figs. Neither can a saltwater spring produce fresh water.

Exodus 15:23-25

And they came to Marah, and they were not able to drink water from Marah because it was bitter. Therefore {it was named} Marah.

2 Kings 2:19-22

The men of the city said to Elisha, "Please now, the location of the city [is] good, as my master can see, but the water [is] bad and the land unproductive."

Isaiah 5:2-4

And he dug it and cleared it of stones, and he planted it [with] choice vines, and he built a watchtower in the middle of it, and he even hewed out a wine vat in it, and he waited for [it] to yield grapes-- but it yielded wild grapes.

Jeremiah 2:21

Yet I planted you [as] a choice vine, all of it a seed of trustworthiness. How then have you altered before me [into something that is] degenerate, the foreign vine?

Ezekiel 47:8-11

And he said to me, "These waters [are] going out to the eastern region, and they go down to the {Jordan Valley}, and they come [to] the sea [and flow] into the sea [where] {they issue out}, and the waters [in the sea] will be healed.

Matthew 7:16-20

You will recognize them by their fruits: they do not gather grapes from thorn bushes or figs from thistles, [do they]?

Matthew 12:33

"Either make the tree good and its fruit [is] good, or make the tree bad and its fruit [is] bad, for the tree is known by its fruit.

Luke 6:43-44

"For there is no good tree that produces bad fruit, nor on the other hand a bad tree that produces good fruit,

Romans 11:16-18

Now if the first fruits [are] holy, [so] also [is] the [whole] batch of dough, and if the root [is] holy, [so] also [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

Isaiah 5:2
And he dug it and cleared it of stones, and he planted it [with] choice vines, and he built a watchtower in the middle of it, and he even hewed out a wine vat in it, and he waited for [it] to yield grapes-- but it yielded wild grapes.
Jeremiah 2:21
Yet I planted you [as] a choice vine, all of it a seed of trustworthiness. How then have you altered before me [into something that is] degenerate, the foreign vine?
Matthew 7:16
You will recognize them by their fruits: they do not gather grapes from thorn bushes or figs from thistles, [do they]?
Matthew 12:33
"Either make the tree good and its fruit [is] good, or make the tree bad and its fruit [is] bad, for the tree is known by its fruit.
Luke 6:43
"For there is no good tree that produces bad fruit, nor on the other hand a bad tree that produces good fruit,
Romans 11:16
Now if the first fruits [are] holy, [so] also [is] the [whole] batch of dough, and if the root [is] holy, [so] also [are] the branches.

So

Exodus 15:23
And they came to Marah, and they were not able to drink water from Marah because it was bitter. Therefore {it was named} Marah.
2 Kings 2:19
The men of the city said to Elisha, "Please now, the location of the city [is] good, as my master can see, but the water [is] bad and the land unproductive."
Ezekiel 47:8
And he said to me, "These waters [are] going out to the eastern region, and they go down to the {Jordan Valley}, and they come [to] the sea [and flow] into the sea [where] {they issue out}, and the waters [in the sea] will be healed.