See the Babylonian Talmud, Ta’anit 16a; Jerusalem Talmud, Ta’anit 2.1 (on the ashes); Mekhilta of R. Simeon ben Yohai, on Exodus 16.2 (on the blood); Louis Ginzberg, The Legends of the Jews, 7 vols. (Philadelphia: Jewish Publication Society, 1909–38), vol. 1, p. 281f., and vol. 251, recounts the tradition that Isaac was also the name of the ram. See also the discussion in Hans Joachim Schoeps, “The Sacrifice of Isaac in Paul’s Theology,” Journal of Biblical Literature 65 (1946), p. 389; and Goodenough, Jewish Symbols, vol. 4, pp. 183–184.