yaqūlūna
they will say
V – 3rd person masculine plural imperfect verb + PRON – subject pronoun na
Root Link: ق و ل
amthaluhum
(the) best of them
N – nominative masculine singular noun + PRON – 3rd person masculine plural object pronoun Ha
Root Link: م ث ل
labith'tum
you remained
V – 2nd person masculine plural perfect verb + PRON – subject pronoun tum
Root Link: ل ب ث