Ezekiel 10:12

And their whole body, and their backs, and their hands, and their wings, and the wheels, were full of eyes round about, even the wheels that they four had.

Cross-reference

Ezekiel 1:18 also depicts wheels full of eyes, reinforcing the same vision of divine omniscience.

Revelation 4:6 describes living creatures full of eyes, echoing the many-eyed cherubim but in a heavenly throne scene.

Revelation 4:8 adds that the four creatures are full of eyes within, similar to the wheel-eyes here.