fa-ir'taqib
So watch
REM – prefixed resumption particle fa + V – 2nd person masculine singular (form VIII) imperative verb
Root Link: ر ق ب
innahum
indeed they
ACC – accusative particle inna + PRON – 3rd person masculine plural object pronoun Ha
Root Link: ا ن ن
mur'taqibūna
(too are) watching
N – nominative masculine plural (form VIII) active participle
Root Link: ر ق ب