עַל־אַרְבַּ֥עַת רִבְעֵיהֶ֖ן בְּלֶכְתָּ֣ם יֵלֵ֑כוּ לֹ֥א יִסַּ֖בּוּ בְּלֶכְתָּֽן׃
輪子行走的時候，向四面中的任何一面直行；行走的時候並不轉向。
Rashi
toward their four sides, etc. Because of the working of the wheels, he had to repeat them [i.e., the description of the living beings’ movements], to say that the wheels did not stop them because they [the living beings] too were made for that [i.e., moving in four directions].