Pariyesanāsutta
“Catasso imā, bhikkhave, anariyapariyesanā. Katamā catasso? Idha, bhikkhave, ekacco attanā jarādhammo samāno jarādhammaṁyeva pariyesati; attanā byādhidhammo samāno byādhidhammaṁyeva pariyesati; attanā maraṇadhammo samāno maraṇadhammaṁyeva pariyesati; attanā saṅkilesadhammo samāno saṅkilesadhammaṁyeva pariyesati. Imā kho, bhikkhave, catasso anariyapariyesanā.
Searches
“Mendicants, there are these four ignoble searches. What four? Someone liable to old age searches only for what grows old. Someone liable to sickness searches only for what gets sick. Someone liable to death searches only for what dies. Someone liable to become corrupted searches only for what is defiled. These are the four ignoble searches.