King James Version (KJV)
The appearance of them {is} as the appearance of horses; and as horsemen, so shall they run.
Modern English
Their appearance is as the appearance of horses, and as horsemen, so do they run.
Hebrew
כְּמַרְאֵ֥ה סוּסִ֖ים מַרְאֵ֑הוּ וּכְפָרָשִׁ֖ים כֵּ֥ן יְרוּצֽוּן׃
kmarʾeh svsiym marʾehv vkparashiym ken yrvṣvn