1 Corinthians 15:56

the sting of death is sin; and the strength of sin is the law:

Romans 4:15

Now the law worketh wrath; for where there is no law, there is no transgression.

John 8:21

Jesus therefore said unto them again, "I am going away, and ye shall seek me, and shall die in your sin: where I go ye cannot come."

John 8:24

Therefore I said unto you, that ye shall die in your sins; for if ye believe not that I am the Messiah, ye shall die in your sins.

Romans 3:19-20

it saith to those under the law: that every mouth may be stopped, and all the world obnoxious to the justice of God.

Romans 5:12-13

Wherefore as by one man sin entered into the world, and death by sin, so death passed upon all men, for to that all have sinned:

Romans 5:15

But not as the offence, so also is the free gift: for if through the offence of one many died, much more hath the grace of God, and the gift bestowed by the grace of one man, Jesus Christ, abounded to many.

Romans 5:17

For if, by the offence of one, death reigned through one, much more they who receive the abundance of grace and of the gift of righteousness, shall reign in life through one, even Jesus Christ.

Romans 5:20

Now the law made some entrance, that the offence might appear to abound; but where sin abounded, grace hath superabounded; that as sin had reigned in death,

Romans 6:23

For the wages of sin is death: but the gift of God is eternal life through Jesus Christ our Lord.

Romans 7:5-13

For when we were in the flesh, the sinful passions while we were under the law operated in our bodies so as to bring forth fruit unto death.

Galatians 3:10-13

For as many as are of the works of the law, are under the curse; for it is written, Cursed be every one that continueth not in all things which are written in the book of the law, to do them.

Hebrews 9:27

And as it is appointed to men once to die, and after this the judgement;

Treasury of Scripture Knowledge

Summary

The sting of death is sin; and the strength of sin is the law.

Bible References

Sting

John 8:21
Jesus therefore said unto them again, "I am going away, and ye shall seek me, and shall die in your sin: where I go ye cannot come."
Romans 5:15
But not as the offence, so also is the free gift: for if through the offence of one many died, much more hath the grace of God, and the gift bestowed by the grace of one man, Jesus Christ, abounded to many.
Romans 6:23
For the wages of sin is death: but the gift of God is eternal life through Jesus Christ our Lord.
Hebrews 9:27
And as it is appointed to men once to die, and after this the judgement;

The strength

Romans 3:19
it saith to those under the law: that every mouth may be stopped, and all the world obnoxious to the justice of God.
Romans 4:15
Now the law worketh wrath; for where there is no law, there is no transgression.
Romans 5:13
for sin was in the world before the law. Now sin is not imputed where there is no law;
Romans 7:5
For when we were in the flesh, the sinful passions while we were under the law operated in our bodies so as to bring forth fruit unto death.
Galatians 3:10
For as many as are of the works of the law, are under the curse; for it is written, Cursed be every one that continueth not in all things which are written in the book of the law, to do them.