“فَ” (fa)This word resumes the flow after a pause or change in thought.Corpus grammarREM — prefixed rem particle.
“أَتْبَعُ” (ʾaatbaʿu)means “So they followed them” in this verse. It is a verb. an action or state word. Here it is perfect verb, verb pattern four, third person — masculine — plural.Corpus grammarV — third person masculine plural perfect verb.
“و” (w)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural subject pronoun.
“هُم” (hum)an attached pronoun meaning “they” or “them.”Corpus grammarPRON — third person masculine plural subject pronoun.