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A picture is worth a thousand words. Gehenna is circled for you. “Gehenna” is a transliteration of the Greek word for “the Valley of Hinnom”. Here are all twelve occurrences of the Greek word “Gehenna” in the New Testament. I have used my favorite translation (the New King James Version), but I have taken the liberty of properly translating “Gehenna”.
Matthew 5:22
But I say to you that whoever is angry with his brother without a cause shall be in danger of the judgment. And whoever says to his brother, “Raca!” shall be in danger of the council. But whoever says, “You fool!” shall be in danger of the fire of the Valley of Hinnom.
Matthew 5:29
If your right eye causes you to sin, pluck it out and cast it from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into the Valley of Hinnom.
Matthew 5:30
And if your right hand causes you to sin, cut it off and cast it from you; for it is more profitable for you that one of your members perish, than for your whole body to be cast into the Valley of Hinnom.
Matthew 10:28
And do not fear those who kill the body but cannot kill the soul. But rather fear Him who is able to destroy both soul and body in the Valley of Hinnom.
Matthew 18:9
And if your eye causes you to sin, pluck it out and cast it from you. It is better for you to enter into life with one eye, rather than having two eyes, to be cast into the fire of the Valley of Hinnom.
Matthew 23:15
Woe to you, scribes and Pharisees, hypocrites! For you travel land and sea to win one proselyte, and when he is won, you make him twice as much a son of the Valley of Hinnom as yourselves.
Matthew 23:33
Serpents, brood of vipers! How can you escape the condemnation of the Valley of Hinnom?
Mark 9:43
If your hand causes you to sin, cut it off. It is better for you to enter into life maimed, rather than having two hands, to go to the Valley of Hinnom, into the fire that shall never be quenched—
Mark 9:45
And if your foot causes you to sin, cut it off. It is better for you to enter life lame, rather than having two feet, to be cast into the Valley of Hinnom, into the fire that shall never be quenched—
Mark 9:47
And if your eye causes you to sin, pluck it out. It is better for you to enter the kingdom of God with one eye, rather than having two eyes, to be cast into the fire of the Valley of Hinnom—
Luke 12:5
But I will show you whom you should fear: Fear Him who, after He has killed, has power to cast into the Valley of Hinnom; yes, I say to you, fear Him!
James 3:6
And the tongue is a fire, a world of iniquity. The tongue is so set among our members that it defiles the whole body, and sets on fire the course of nature; and it is set on fire by the Valley of Hinnom.