At this, those who heard began to go away one at a time, the older ones first, until only Jesus was left, with the woman still standing there. (NIV)

They listened to Him, and then they began going out, conscience-stricken, one by one, from the oldest down to the last one of them, till Jesus was left alone, with the woman standing there before Him in the center of the court. (AMP)

And they which heard it, being convicted by their own conscience, went out one by one, beginning at the eldest, even unto the last: and Jesus was left alone, and the woman standing in the midst. (KJV)