Yechezkel 10:7-8

Orthodox Jewish Bible

⁷ And one Keruv stretched forth his yad from between the Keruvim unto the eish that was between the Keruvim, and took thereof, and put it into the hands of him that was clothed with linen: who took it, and went out.

⁸ And Keruvim appeared to have the tavnit (form) of a yad adam under their kenafayim (wings).