Yoga Sutras of Patanjali
In the Yoga Sutras of Patanjali, "samāpatti" is discussed as the universal form of the Yoga called samprajñāta-samadhi, or "savikalpa samadhi", followed by asamprajñāta-samadhi, or "nirvikalpa samadhi". It has as its prerequisite the annihilation of all (non-sattvic) modifications ("vṛtti") of mind ("citta").