For 10 points, name this type of religious practice in which individuals concentrate on, sharpen, or empty their thoughts.
One text named for this practice features Ajatashatru's attempt to starve king Bimbisara as a frame narrative and uses the setting sun as the first of thirteen images of the Pure Land. In some traditions, a form of this practice called nididhyasana must follow after reading Vedanta texts. The nature of breathing is described in a sutra named for a form of this practice called Anapanasati. In some Hindu traditions, a form of this called dhāraṇā leads to the state of dhyanā, which is also attested in the Pali Canon. The three "marks of existence" are noticed in the vipassana form. Dogen, a Japanese monk, wrote a treatise on a form of it known as zazen in which the practitioner is seated. For 10 points, name this type of religious practice in which individuals concentrate on, sharpen, or empty their thoughts.
One text named for this practice features Ajatashatru's attempt to starve king Bimbisara as a frame narrative and uses the setting sun as the first of thirteen images of the Pure Land.
meditation [or meditating; prompt "prayer," "silent prayer," "thought," or "contemplation"; accept meditation on Amitabha-Buddha or meditation on Amitayus-Buddha until "nididhyasana" is read]