Matthew 3:10

and 12].

John 15:6

If a person does not remain united to me, he will be thrown out as a [fruitless] branch and dried up. People gather up such branches and throw them into the fire to be burned [as fuel ?].

Treasury of Scripture Knowledge

Summary

But she was plucked up in fury, she was cast down to the ground, and the east wind dried up her fruit: her strong rods were broken and withered; the fire consumed them.

Bible References

The fire

Matthew 3:10
And even now the axe is ready to chop down the trees [i.e., you Jewish people]. Every tree [i.e., person] that does not produce wholesome fruit [i.e., godly, repentant lives] will be cut down and thrown into the fire [i.e., the final punishment of the wicked].
John 15:6
If a person does not remain united to me, he will be thrown out as a [fruitless] branch and dried up. People gather up such branches and throw them into the fire to be burned [as fuel ?].