Where did the hymn 'buried he carried our sins far away' get its imagery?

Les teaches that the hymn writer picked up the line 'buried he carried our sins far away' from the scapegoat ritual. The live goat had Israel's iniquities, transgressions, and sins confessed over it, then a fit man sent it into the wilderness—a place with no record or geographical pinpoint. Les says this pictures what Christ did when He died. He notes that while Christ was on the cross, three hours of darkness and absolute silence occurred, after which He spoke final statements and gave up the ghost of His own volition.