Question

Which parts of this passage contain a biblical allusion?

Answer 1

"On kin of Cain was the killing avenged
by sovran God for slaughtered Abel."

This, of course, refers to Cain and Abel from the Bible. According to the Bible, they were two sons of Adam and Eve. Cain killed his own brother, Abel, and thus further cursed the mankind.

Answer 2

1 "On kin of Cain was the killing avenged

by sovran God for slaughtered Abel."

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