Hadhrat Anas R.A. narrates that Rasulullah:saws1: said,
"No young person shows respect to an old man on account of his old age without Allah :swt: appointing someone to show respect to him when he becomes old." -- Tirmidhi.
"No young person shows respect to an old man on account of his old age without Allah :swt: appointing someone to show respect to him when he becomes old." -- Tirmidhi.