Genesis 37:21

And Reuben heard it, and delivered him out of their hand, and said, Let us not take his life.

Genesis 42:22

And Reuben answered them, saying, Spake I not unto you, saying, Do not sin against the child; and ye would not hear? therefore also, behold, his blood is required.

Genesis 9:5

And surely your blood, the blood of your lives, will I require; At the hand of every beast will I require it. And at the hand of man, even at the hand of every man's brother, will I require the life of man.

Genesis 35:22

And it came to pass, while Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard of it. Now the sons of Jacob were twelve:

Joshua 10:28

And Joshua took Makkedah on that day, and smote it with the edge of the sword, and the king thereof: he utterly destroyed them and all the souls that were therein; he left none remaining; and he did to the king of Makkedah as he had done unto the king of Jericho.

Matthew 10:28

And be not afraid of them that kill the body, but are not able to kill the soul: but rather fear him who is able to 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
And it came to pass, while Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard of it. Now the sons of Jacob were twelve:
Genesis 42:22
And Reuben answered them, saying, Spake I not unto you, saying, Do not sin against the child; and ye would not hear? therefore also, behold, his blood is required.

Not kill him

Joshua 10:28
And Joshua took Makkedah on that day, and smote it with the edge of the sword, and the king thereof: he utterly destroyed them and all the souls that were therein; he left none remaining; and he did to the king of Makkedah as he had done unto the king of Jericho.
Genesis 9:5
And surely your blood, the blood of your lives, will I require; At the hand of every beast will I require it. And at the hand of man, even at the hand of every man's brother, will I require the life of man.
Matthew 10:28
And be not afraid of them that kill the body, but are not able to kill the soul: but rather fear him who is able to destroy both soul and body in hell.

American Standard Version Public Domain