'Backward' in the Bible

Then Shem and Japheth took a garment, and the two of them put [it] on [their] shoulders and, walking backward, they covered the nakedness of their father. And their faces [were turned] backward, so that they did not see the nakedness of their father.

Dan shall be a serpent on the way, a viper on the road that bites the heels of a horse, so that its rider falls backward.