Ezekiel 1:20-21

1:20 Wherever the spirit would go, they would go, and the wheels would rise up beside them because the spirit of the living being was in the wheel. 1:21 When the living beings moved, the wheels moved, and when they stopped moving, the wheels stopped. When they rose up from the ground, the wheels rose up from the ground; the wheels rose up beside them because the spirit of the living being was in the wheel.

Hebrews 1:14

1:14 Are they not all ministering spirits, sent out to serve those who will inherit salvation?