To turn back the summons of the dakinis
To turn back the summons of the ḍākinīs (Wyl. mka' 'gro sun ma blog):
Dakas and dakinis don’t like it when great beings remain in the world, and they can call them back into the expanse of primordial wisdom at any time, in other words calling them to other buddha realms. In longevity practices like tenshyuk ceremonies we ask them not to, to prevent them from calling the master back.