'Backward' in the Bible

So Shem and Japheth took a robe and put it on both their shoulders, and walked backwards and covered the nakedness of their father; their faces were turned away so that they did not see their father’s nakedness.

“Dan shall be a [venomous] serpent in the way,A fanged snake in the path,That bites the horse’s heels,So that his rider falls backward.