Genesis 4:10
8 Cain spoke to his brother Abel.21 While they were in the field, Cain attacked his brother Abel and killed him. 9 Then the Lord said to Cain, “Where is your brother Abel?” And he replied, “I don’t know! Am I my brother’s guardian?” 10 But the Lord said, “What have you done? The voice of your brother’s blood is crying out to me from the ground! 11 So now you are banished from the ground, which has opened its mouth to receive your brother’s blood from your hand. 12 When you try to cultivate the ground it will no longer yield its best for you. You will be a homeless wanderer on the earth.”
1 Enoch 7:6
2 And they became pregnant, and they bare great giants, whose height was three thousand ells: 3 Who consumed all the acquisitions of men. And when men could no longer sustain them, 4 the giants turned against them and devoured mankind. 5 And they began to sin against birds, and beasts, and reptiles, and fish, and to devour one another's flesh, and drink the blood. 6 Then the earth laid accusation against the lawless ones.
Notes and References
"... Chs. 7-8 explain how the Watchers chose wives and had children with them. Their children were the Nephilim or giants, and these giants devoured the supplies of food that were available to men to the point that they began to kill and eat men, birds, insects, fish, and even each other. This causes the earth to accuse the Nephilim to heaven, reminiscent of Abel’s blood crying from the ground in Gen. 4:10. The Watchers teach all the mysteries to their wives and children, and as men are dying their cries reach to heaven ..."
Townsend, Colby J. The Use of Scripture in 1 Enoch 1-36 (p. 36) University of Utah, 2016