TgJ Is64:5 :וַהְוֵינָא כִמסָאַב כוּלַנָא וֻכִלבוּש מְרַחַק כָל זָכְוָתַנָא‏ : we were all like something unclean and like discarded clothing all our meritorious acts
See the entire entry for mraḥḥaq adj. unclean; distant