That Karma-prakṛti (type of Karma), the bondage of which can take place both during the period of its Udaya (rise) and anudaya (non-rise), e.g., Nidrā (restful sleep), Nidrā-nidrā (unrestful sleep) etc..
ubhayasminnudaye'nudaye vā bandho yāsāṃ tāḥ ubhayabaṃdhinyaḥ.
(Kapra p.40)