At Savatthi. sn.iii.52 “Bhikkhus, attend carefully to form. Recognize the impermanence of form as it really is. When a bhikkhu attends carefully to form and recognizes the impermanence of form as it really is, he experiences revulsion towards form. With the destruction of delight comes the destruction of lust; with the destruction of lust comes the destruction of delight. With the destruction of delight and lust the mind is liberated and is said to be well liberated.
“Bhikkhus, attend carefully to feeling … to perception … to volitional formations … to consciousness…. With the destruction of delight and lust the mind is liberated and is said to be well liberated.”