וְאַרְבָּעָ֥ה פָנִ֖ים לְאֶחָ֑ד פְּנֵ֨י הָאֶחָ֜ד פְּנֵ֣י הַכְּר֗וּב וּפְנֵ֤י הַשֵּׁנִי֙ פְּנֵ֣י אָדָ֔ם וְהַשְּׁלִישִׁי֙ פְּנֵ֣י אַרְיֵ֔ה וְהָרְבִיעִ֖י פְּנֵי־נָֽשֶׁר׃
Rashi on Ezekiel
the face of one was the face of the cherub That was the face of the ox, which was transformed into a cherub.