坐禪三昧經 1.24

1.24

若初習行，當教言生緣老死，無明緣行。如是思惟，不令外念；外念諸緣，攝之令還。若已習行，當教言行緣識、識緣名色、名色緣六入、六入緣觸、觸緣受、受緣愛、愛緣取、取緣有。如是思惟，不令外念；外念諸緣，攝之令還。若久習行，當教言無明緣行、行緣識、識緣名色、名色緣六入、六入緣觸、觸緣受、受緣愛、愛緣取、取緣有、有緣生、生緣老死。如是思惟，不令外念；外念諸緣，攝之令還。

If one is a beginning practitioner, one should be instructed: 'Birth is the condition for aging and death; ignorance is the condition for formations.' Contemplating in this way, do not let thoughts stray outward; when thoughts stray outward to various conditions, gather them and bring them back. If one has already practiced, one should be instructed: 'Formations are the condition for consciousness; consciousness is the condition for name-and-form; name-and-form is the condition for the six sense bases; the six sense bases are the condition for contact; contact is the condition for feeling; feeling is the condition for craving; craving is the condition for clinging; clinging is the condition for existence.' Contemplating in this way, do not let thoughts stray outward; when thoughts stray outward to various conditions, gather them and bring them back. If one has long practiced, one should be instructed: 'Ignorance is the condition for formations; formations are the condition for consciousness; consciousness is the condition for name-and-form; name-and-form is the condition for the six sense bases; the six sense bases are the condition for contact; contact is the condition for feeling; feeling is the condition for craving; craving is the condition for clinging; clinging is the condition for existence; existence is the condition for birth; birth is the condition for aging and death.' Contemplating in this way, do not let thoughts stray outward; when thoughts stray outward to various conditions, gather them and bring them back.