Jhanasutta 2.4

2.4

So yadeva tattha hoti rūpagataṃ vedanāgataṃ saññāgataṃ saṅkhāragataṃ viññāṇagataṃ, te dhamme aniccato dukkhato rogato gaṇḍato sallato aghato ābādhato parato palokato suññato anattato samanupassati.

They contemplate the phenomena there—included in form, feeling, perception, choices, and consciousness—as impermanent, as suffering, as diseased, as a boil, as a dart, as gloom, as an affliction, as alien, as breaking apart, as empty, as not-self.