Question

Which two parts of this passage contain a biblical allusion

Answer 1

The last 2, so the ones that include Cain. :)

Answer 2

On kin of Cain was the killing avenged

by sovran God for slaughtered Abel.

Ill fared his feud, and far was he driven,

for the slaughter’s sake

from sight of men. Of Cain awoke all that woful breed

These two parts of the passage refers to Cain and Abel, two brothers who appear in the Bible. Cain and Abel were two sons of Adam and Eve. Cain killed his own brother, Abel, and as a result, he further cursed the mankind.