fasakharnā
Then We subjected
REM – prefixed resumption particle fa + V – 1st person plural (form II) perfect verb + PRON – 1st person plural object pronoun nā
Root Link: س خ ر
lahu
to him
P – prefixed preposition lām + PRON – 3rd person masculine singular personal pronoun hu
Root Link: ل
bi-amrihi
by his command
P – prefixed preposition bi + N – genitive masculine noun + PRON – 3rd person masculine singular possessive pronoun ha
Root Link: ا م ر