Answer:
I believe it's "On kin of Cain was the killing avenged
by sovran God for slaughtered Abel" and "Of Cain awoke all that woful breed", but it could also be those quotes combined and "since the Creator his exile doomed".
Explanation:
The first allusion is to Cain and Abel, the brothers born to Adam and Eve in the Bible. This question could be referring to the two places where Cain and Able are referenced in the poem, or it could also be referring to the place where it mentions the "Creator", which is a common name for God in the bible (especially in Genesis, where the story of Cain and Abel occurs).