Genesis 37:21

Now Reuben [the eldest] heard this and rescued him from their hands and said, “Let us not take his life.”

Genesis 42:22

Reuben answered them, “Did I not tell you, ‘Do not sin against the boy’; and you would not listen? Now the accounting for his blood is required [of us for we are guilty of his death].”

Genesis 9:5

For your lifeblood I will most certainly require an accounting; from every animal [that kills a person] I will require it. And from man, from every man’s brother [that is, anyone who murders] I will require the life of man.

Genesis 35:22

While Israel was living in that land, Reuben [his eldest son] went and lay with Bilhah his father’s concubine, and Israel heard about it.

Now Jacob had twelve sons—

Joshua 10:28

Now Joshua captured Makkedah on that day, and struck it and its king with the edge of the sword; he utterly destroyed it and everyone who was in it. He left no survivor. So he did to the king of Makkedah just as he had done to the king of Jericho.

Matthew 10:28

Do not be afraid of those who kill the body but cannot kill the soul; but rather be afraid of Him who can destroy both soul and body in hell.

Treasury of Scripture Knowledge

Summary

And Reuben heard it, and he delivered him out of their hands; and said, Let us not kill him.

Bible References

Reuben heard

Genesis 35:22
While Israel was living in that land, Reuben [his eldest son] went and lay with Bilhah his father’s concubine, and Israel heard about it.

Now Jacob had twelve sons—
Genesis 42:22
Reuben answered them, “Did I not tell you, ‘Do not sin against the boy’; and you would not listen? Now the accounting for his blood is required [of us for we are guilty of his death].”

Not kill him

Joshua 10:28
Now Joshua captured Makkedah on that day, and struck it and its king with the edge of the sword; he utterly destroyed it and everyone who was in it. He left no survivor. So he did to the king of Makkedah just as he had done to the king of Jericho.
Genesis 9:5
For your lifeblood I will most certainly require an accounting; from every animal [that kills a person] I will require it. And from man, from every man’s brother [that is, anyone who murders] I will require the life of man.
Matthew 10:28
Do not be afraid of those who kill the body but cannot kill the soul; but rather be afraid of Him who can destroy both soul and body in hell.