וּמַ֨רְאֵיהֶ֔ם דְּמ֥וּת אֶחָ֖ד לְאַרְבַּעְתָּ֑ם כַּאֲשֶׁ֛ר יִהְיֶ֥ה הָאוֹפַ֖ן בְּת֥וֹךְ הָאוֹפָֽן׃
And as for their appearance, they four had one likeness, as if a wheel had been within a wheel.
Find Talmudic references to Ezekiel 10:10: , passages from the Talmud Bavli and Yerushalmi.