Unrestful sleep- A sub-type of Darśanāvaraṇīya (intuition-veiling) Karma;
1. The Udaya (rise) of this sub-type is responsible for discomfortable sleep which terminates in unhappiness (or it ends with too much efforts).
2. The state of sleep, in which the consciousness gets immensely obscured; one becomes fast asleep.
nidrātiśāyinī nidrā nidrānidrā....hyatyarthamasphuṭatanbhūtacaitanyatvādduḥkhena bahubhirgholanādibhiḥ prabodho bhavatyataḥ suprabodhānidrāpekṣayā asyā atiśāyinītvaṃ tadvipākavedyā karmmaprakṛtirapi kāryadvāreṇa nidrā- nidretyucyate. '
(Sthā 9.14 Vṛ Pa 424)
uparyupari tadvṛttirnidrānidrā.
(TaVā 8.7)