Noah in rabbinic literature "Sefer haYashar" describes another method for distinguishing them: the clean animals and fowls crouched before Noah, while the unclean ones remained standing. A difference of opinion concerning Noah prevails also with regard to his entering into the ark. According to some rabbis, Noah's faith was so small that he did not enter the ark until he stood ankle deep in water (Genesis Rabba xxxii. 9); others declare, on the contrary, that Noah waited for God's directions to enter the ark, just as he awaited His permission to leave it (ib. 34.4; Midrash Agadat Bereshit, in Jellinek, "B. H." iv. 11).
Book of Noah En. 106-107 On these chapters may have followed Eth. En. 6-11., 65-69:25, 60, 41:3-8, 43-44, 54:7-55:2; Jubilees 7:26-39, 10:1-15. The Hebrew "Book of Noah", a later work, is printed in Adolf Jellinek's "Bet ha-Midrasch", 3:155-156, and translated into German in Rönsch, "Das Buch der Jubiläen", 385-387. It is based on the part of the above Book of Noah which is preserved in the "Book of Jubilees". The portion of this Hebrew work which is derived from the older work is reprinted in Charles's "Ethiopic Version of the Hebrew Book of Jubilees", p. 179. James Charlesworth writes (footnotes used for clarity)