Physical tranquility is the awakening factor of tranquility; and mental tranquility is also the awakening factor of tranquility. In this way what is concisely referred to as ‘the awakening factor of tranquility’ becomes twofold.
Immersion while placing the mind and keeping it connected is the awakening factor of immersion; and immersion without placing the mind and keeping it connected is also the awakening factor of immersion. In this way what is concisely referred to as ‘the awakening factor of immersion’ becomes twofold.
Equanimity for internal things is the awakening factor of equanimity; and equanimity for external things is also the awakening factor of equanimity. In this way what is concisely referred to as ‘the awakening factor of equanimity’ becomes twofold. This is the way in which the seven awakening factors become fourteen.”
Linked Discourses 46.53 6. Discussion Fire
Then several mendicants robed up in the morning and, taking their bowls and robes, entered Sāvatthī for alms. (The same as the previous discourse.)