Midras Yesaya 1:31: Aggadat Bereshit

[4] Another interpretation: "Moreover, the day is coming, burning like a furnace; all the arrogant and every evildoer will be stubble, and the day that is coming will set them on fire," says the Lord Almighty. The sages say, the hell of Israel is theirs and the hell of the Gentiles is theirs. Israel says, the hell of the Gentiles is ours and our hell is for them. This can be compared to two people who were selling goods, one sold linen and the other sold cotton. The one who sold linen said, "This cotton is mine," and the one who sold cotton said, "This linen is mine." The owner of the merchandise said to them, "You are arguing about which is yours and which is his, but before you there is a fire that will test which is linen and which is cotton." So the Gentiles say that the Garden of Eden is theirs and the hell of Israel is theirs, but Israel says no. The Lord says, "Behold, fire is before you; walk in the light of your fires and of the torches you have set ablaze" (Isaiah 50:11). The fire is in your hand. Isaiah also says, "And there will be a shelter to give shade from the heat by day, and a refuge and hiding place from the storm and rain" (Isaiah 4:6). This refers to King Hezekiah, who worked to ignite the flame of the Temple altar (Ta'anit 28b). This is the meaning of "And they shall both burn together" (Isaiah 4:4); the linen and the cotton will be burnt together, as it is said, "My people will be burned up completely, like thorns among the flames" (Isaiah 33:12). The cotton was not burned, as it is said, "When you walk through the fire, you will not be burned; the flames will not set you ablaze" (Isaiah 43:2).