According to Jesus, when will hell burn?

“The harvest is the end of the age, and the harvesters are angels. As the weeds are pulled up and burned in the fire, so it will be AT THE END OF THE AGE [WORLD, KJV]. The Son of Man will send out his ANGELS, and they will WEED OUT of his kingdom EVERYTHING THAT CAUSES SIN AND ALL WHO DO EVIL. THEY WILL THROW THEM INTO THE FIERY FURNACE, where there will be weeping and gnashing of teeth. Then the righteous will shine like the sun in the kingdom of their Father.”
—Matthew 13:39-43.

The weeds, the evil-doers, aren’t burned until the end of the world. Before this sentence is carried out, the whole universe must be assured that God has been fair in his dealings with every human being. In the great controversy going on between Christ and Satan, Satan has been attempting to prove to the universe that the way of sin is the better way; Jesus has been demonstrating that the way of obedience is the key to a more satisfying life. This demonstration will culminate in the judgment of Satan, his angels, and the wicked “at the end of the world.”

At the close of the 1,000 years, after the angels have opened the records to reveal the part that each person has played in this great drama, God will throw Satan, death, and hell, along with everyone whose name is “not found written in the book of life . . . into the lake of fire” (Revelation 20:15).

According to the next verse, Revelation 21:1, after God cleanses the earth from sin with fire, He creates “a new heaven and a new earth.”