Dhamma Verses (Dhammapada, KN 2)

25: The Chapter about Monastics – 307
No fondness for mind or body
A brahmin became well known for giving of the first fruits of
the harvest before he would take his own food; one day as he
was taking his meal the Buddha appeared at the door, and the
brahmin offered him the remainder of his meal and asked him
to teach what were the characteristics of a true monk.
367. Sabbaso nāmarūpasmiṁ yassa natthi mamāyitaṁ,
asatā ca na socati, sa ve bhikkhū ti vuccati.
The one who does not have fondness
at all for mind and body, who
grieves not for what does not exist,
is surely called a monastic.