Matthew 5:29-30

If your right eye causes you to sin, tear it out and throw it away. For it is better that you lose one of your members than that your whole body be thrown into hell. And if your right hand causes you to sin, cut it off and throw it away. For it is better that you lose one of your members than that your whole body go into hell.

Note: These verses continue to elaborate on Matthew 5:20 regarding righteousness that “exceeds that of the scribes and Pharisees”. Jesus is revealing new information about eternal life, i.e. that the consequence of sin is more than death of one’s body, that “your whole body (will) be thrown into hell”.

Similar Old Testament Verses

Behold, all souls are mine; the soul of the father as well as the soul of the son is mine: the soul who sins shall die.

Ezekiel 18:4
Note: Definition of “soul“.

… but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall surely die.

Genesis 2:17

For you will render to a man according to his work.

Psalm 62:12

If you say, “Behold, we did not know this,”
does not he who weighs the heart perceive it?
Does not he who keeps watch over your soul know it, and will he not repay man according to his work?

Proverbs 24:12

You who are of purer eyes than to see evil
and cannot look at wrong…

Habakkuk 1:13
Note: “You” refers to God.

But as for those whose heart goes after their detestable things and their abominations, I will bring their deeds upon their own heads, declares the Lord GOD.

Ezekiel 11:21

Scripture quotations are from The ESV® Bible (The Holy Bible, English Standard Version®), © 2001 by Crossway, a publishing ministry of Good News Publishers. Used by permission. All rights reserved.