fasatub'ṣiru
So you will see
REM – prefixed resumption particle fa + FUT – prefixed future particle sa + V – 2nd person masculine singular (form IV) imperfect verb
Root Link: ب ص ر
wayub'ṣirūna
and they will see
CONJ – prefixed conjunction wa (and) + V – 3rd person masculine plural (form IV) imperfect verb + PRON – subject pronoun na
Root Link: ب ص ر