'Behind' in the Bible

The priest said, "The sword of Goliath the Philistine, whom you killed in the valley of Elah, behold, it is here wrapped in a cloth behind the ephod. If you will take that, take it; for there is no other except that here." David said, "There is none like that. Give it to me."

David also arose afterward, and went out of the cave, and cried after Saul, saying, "My lord the king!" When Saul looked behind him, David bowed with his face to the earth, and did obeisance.

So David went, he and the six hundred men who were with him, and came to the brook Besor, where those who were left behind stayed.

But David pursued, he and four hundred men; for two hundred stayed behind, who were so faint that they couldn't go over the brook Besor.