Paṭisallānasutta

sn56.2:1.1 “Mendicants, meditate in retreat.

sn56.2:1.2 A mendicant in retreat truly understands.

sn56.2:1.3 What do they truly understand?

sn56.2:1.4 They truly understand: ‘This is suffering’ … ‘This is the origin of suffering’ … ‘This is the cessation of suffering’ … ‘This is the practice that leads to the cessation of suffering’.

sn56.2:1.5 Meditate in retreat.

sn56.2:1.6 A mendicant in retreat truly understands.