Ezekiel 1:22-23

1:22 Over the heads of the living beings was something like a platform, glittering awesomely like ice, stretched out over their heads. 1:23 Under the platform their wings were stretched out, each toward the other. Each of the beings also had two wings covering its body.

Ezekiel 3:13

3:13 and the sound of the living beings’ wings brushing against each other, and the sound of the wheels alongside them, a great rumbling sound.