Ibn Mas'ud told of the Prophet saying to his companions one day, “Show due respect towards God.” On their replying, “Prophet of God, we show due respect towards God, praise be to God,” he said, “That is not what I mean; but he who shows due respect to God must guard the head and what it retains, must guard the belly and what it contains, and keep death and decay in remembrance; and he who desires the next world must abandon the adornment of this world. He who does that has shown due respect towards God.” Ahmad and Tirmidhi transmitted it, the latter saying this is a gharib tradition.