What did Jesus say would be the punishment of unrepentant sinners?

Mark 9:43- 44
And if thy hand offend thee, cut it off: it is better for thee to enter into life maimed, than having two hands to go into hell, into the fire that never shall be quenched: Where their worm dieth not, and the fire is not quenched.

Unrighteous will be punished by being put into "Hell,"

Here Jesus plainly states that the unrighteous will be punished by being put into "hell," which He describes as a fire that will not be quenched. In this scripture, the word "hell" in the Greek is (geenna) Spoken as (gheh'-en-nah) This word means "Valley of Hinnom," a valley on the south side of Jerusalem where refuse was continually burned. Jesus used this area as a type of the place where the wicked will receive their final punishment.

What is the fate of the wicked?

Revelation 21:8

The Bible describes the "hellfire" into which the wicked will be cast as a lake of burning fire and brimstone. Some have pictured this Lake of Fire to be like an active volcano spewing out molten rock. Into such a fiery liquid the incorrigible will be thrown.

Revelations 20 vs. 6 - 15