Vaisesika Sūtra 10.1.05

सति च कार्यादर्शनात् ॥५॥

sati ca kārya-adarśanāt ॥5॥

[सति (sati) - though present; च (ca) - and; कार्य (kārya) - effect; अदर्शनात् (adarśanāt) - due to non-perception;]

Though present, (in present it is not perceived) due to non-perception of the effect.