Abhirūpanandā

Nandā, see this bag of bones as
diseased, filthy, and rotten.
With mind unified and serene,
meditate on the ugly aspects of the body.

Meditate on the signless,
give up the underlying tendency to conceit;
and when you comprehend conceit,
you will live at peace.

That is how the Buddha regularly advised the senior nun Nandā with these verses.