International Standard Version how when you were very tired and weary, they lay in wait for you on the road and eliminated everyone who was lagging behind. They had no fear of God.
American Standard Version how he met thee by the way, and smote the hindmost of thee, all that were feeble behind thee, when thou wast faint and weary; and he feared not God.
Young's Literal Translation that he hath met thee in the way, and smiteth in all those feeble behind thee (and thou wearied and fatigued), and is not fearing God.