John Calvin on Ezekiel 1:6

He now comes to the heads and wings themselves. Many suppose that each animal had four heads, and then that four appearances belonged to each head; others extend the wings much further, because they assign four wings to each of the four heads, and others even sixteen; but this does not seem in accordance with the Prophet’s words. He simply says each had four heads, and then four wings. The wings and the heads correspond; but one animal was endowed with only four heads, and so I do not think that it had more than four wings, which will again be evident from the context. He adds afterwards —

Ezekiel 1:7

7. And their feet were straight feet; and the sole of their feet was like the sole of a calf’s foot: and they sparkled like the colour of burnished brass.

7. Et pedes eorum pes rectus, et planta pedis eorum tanquam planta pedis vituli: I conjecture that the points have been changed in this place, because עגל signifies round, and here עגל is put, which is a calf. I know no reason why the Prophet should say calves’ feet or like a calf: this seems rather strange, but I do not contend about trifles. — Calvin. et scintillas jaciebant, Others. translate, “and sparks” — Calvin. tanquam aspectus chalybis politi.