Leviticus 24:21

He who puts a beast to death will have to make payment for it; he who puts a man to death will himself be put to death.

Leviticus 24:17-18

And anyone who takes another's life is certainly to be put to death.

Exodus 21:33

If a man makes a hole in the earth without covering it up, and an ox or an ass dropping into it comes to its death;

Treasury of Scripture Knowledge

Summary

And he that killeth a beast, he shall restore it: and he that killeth a man, he shall be put to death.

General references

Bible References

A beast

Leviticus 24:18
And anyone wounding a beast and causing its death, will have to make payment for it: a life for a life.
Exodus 21:33
If a man makes a hole in the earth without covering it up, and an ox or an ass dropping into it comes to its death;

A man

Leviticus 24:17
And anyone who takes another's life is certainly to be put to death.

General references

Exodus 20:13
Do not put anyone to death without cause.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain