Skandapurana 5.215.57

5.215.57

devānāṃ caiva yatkavyaṃ tannāsmākaṃ pratṛ ptaye ..
yataḥ kriyāvihīnaṃ tanna teṣāṃ vidyate kriyā .. 57 ..

And whatever ancestral offering belongs to the gods, that is not for our satisfaction; / because it is devoid of ritual, [as] no ritual action exists for them.