Yōga Sūtra 1.25

तत्र निरतिशयं सर्वज्ञबीजम्।

tatra niratiśayaṁ sarvajñabījam।

[तत्र निरतिशयं सर्वज्ञ बीजम्।
tatra = In HIM; niratiśayaṁ = is ever infinite; sarvajña = omniscience; bījam = the seed of;]

In HIM the seed of omniscience (sarvajña) is ever infinite.

The other special attribute of īśvaraḥ is Omniscience i.e He is all knowing.