In Genesis 3:23, Adam is sent to till the ground as a consequence of the Fall, the same work assigned to Cain.

In Genesis 27:41, Esau's murderous hatred for Jacob mirrors the fraternal conflict that begins with Cain and Abel.

In Genesis 2:5, God's creation order established the need for a man to cultivate the ground, the very work Cain now does.

In Genesis 46:32-34, shepherding is the family's ancestral trade. Abel, the first biblical shepherd, begins this pastoral identity carried to Egypt.

Genesis 47:3 — the brothers tell Pharaoh 'your servants are shepherds, both we and our fathers,' echoing Abel as Scripture's first named shepherd.

In 1 John 3:12, Cain is explicitly named as the model of evil, whose deeds were wicked and whose sacrifice was not accepted.