In the Book of Enoch (22:7), regarded by most Christian and Jewish traditions as extra-biblical, the soul of Abel is described as having been appointed as the chief of martyrs, crying for vengeance, for the destruction of the seed of Cain.
ɪnðə bˈʊk ʌv ˈiːnɑːk twˈɛnti tˈuː:sˈɛvən, ɹᵻɡˈɑːɹdᵻd baɪ mˈoʊst kɹˈɪstʃən ænd dʒˈuːɪʃ tɹɐdˈɪʃənz æz ˈɛkstɹəbˈɪblɪkəl, ðə sˈoʊl ʌv ˈeɪbəl ɪz dᵻskɹˈaɪbd æz hˌævɪŋ bˌɪn ɐpˈɔɪntᵻd æz ðə tʃˈiːf ʌv mˈɑːɹɾɚz, kɹˈaɪɪŋ fɔːɹ vˈɛndʒəns, fɚðə dᵻstɹˈʌkʃən ʌvðə sˈiːd ʌv kˈeɪn.