Dhamma Verses (Dhammapada, KN 2)

11: The Chapter about Old Age – 147
What lies hidden in the body
The Buddha caused Ven. Rūpanandā, who was proud of her
beauty, to see an image of a very beautiful woman quickly go
through the stages of life, die, and be eaten by animals, and
she gained insight into the nature of the body; the Buddha then
spoke this verse.
150. Aṭṭhīnaṁ nagaraṁ kataṁ,
maṁsalohitalepanaṁ,
yattha jarā ca maccu ca,
māno makkho ca ohito.
This fortress is made out of bones,
plastered over with flesh and blood,
but hidden within lie old age,
death, also conceit and anger.