their.

Mark 9:46, 48
Where their worm dieth not, and the fire is not quenched. . . .

Isaiah 66:24
"As they go forth, they will see the corpses of the men who have rebelled against Me; for their worm will never die, their fire will never be quenched, and they will be a horror to all mankind."

the fire.

Isaiah 33:14
The sinners in Zion are afraid; trembling grips the ungodly: "Who of us can dwell with a consuming fire? Who of us can dwell with everlasting flames?"

Matthew 3:12
His winnowing fork is in His hand to clear His threshing floor and to gather His wheat into the barn; but He will burn up the chaff with unquenchable fire."

Matthew 25:41, 46
Then He will say to those on His left, 'Depart from Me, you who are cursed, into the eternal fire prepared for the devil and his angels. . . .

2 Thessalonians 1:9
They will suffer the penalty of eternal destruction, separated from the presence of the Lord and the glory of His might,

Revelation 14:10, 11
he too will drink the wine of God's anger, poured undiluted into the cup of His wrath. And he will be tormented in fire and brimstone in the presence of the holy angels and of the Lamb. . . .

Revelation 20:10, 15
And the devil who had deceived them was thrown into the lake of fire and sulfur, into which the beast and the false prophet had already been thrown. There they will be tormented day and night forever and ever. . . .

Revelation 21:8
But to the cowardly and unbelieving and abominable and murderers and sexually immoral and sorcerers and idolaters and all liars, their place will be in the lake that burns with fire and sulfur. This is the second death."