King James Version (KJV)
For they sleep not, except they have done mischief; and their sleep is taken away, unless they cause some to fall.
Modern English
For they cannot sleep unless they have done wrong; they are robbed of sleep unless they have made someone stumble.
Hebrew
כִּ֤י לֹ֣א יִשְׁנ֣וּ אִם לֹא יָרֵ֑עוּ וְנִגְזְלָ֥ה שְׁנָתָ֗ם אִ֣ם לֹ֣א יַכְשִֽׁילוּ׃
kiy loʾ yishnv ʾim loʾ yareʿv vnigzlah shnatam ʾim loʾ yakshiylv