'phen byed kyi las

འཕེན་བྱེད་ཀྱི་ལས
propelling karma, forcing action, karma that throws [one into a certain rebirth], precipitate action [RY]

impelling karma [IW]

'impelling action' gnas ris gang du skye bar byed pa'i las so an action which causes rebirth in a certain realm. Comp. rdzogs byed kyi las [RY]

x 'phen byed kyi las zad pa na once the effect of the past actions that produced that condition has exhausted itself [RY]

impelling karma [producing the realm in which 1 will be born] [IW]