lalabitha
Certainly he (would have) remained
EMPH – emphatic prefix lām + V – 3rd person masculine singular perfect verb
Root Link: ل ب ث
baṭnihi
its belly
N – genitive masculine noun + PRON – 3rd person masculine singular possessive pronoun ha
Root Link: ب ط ن
yub'ʿathūna
they are resurrected
V – 3rd person masculine plural passive imperfect verb + PRON – subject pronoun na
Root Link: ب ع ث