yusabbiḥūna
They glorify (Him)
V – 3rd person masculine plural (form II) imperfect verb + PRON – subject pronoun na
Root Link: س ب ح
wal-nahāra
and [the] day
CONJ – prefixed conjunction wa (and) + DET – determiner prefix al + N – accusative masculine noun
Root Link: ن ه ر
yafturūna
they slacken
V – 3rd person masculine plural imperfect verb + PRON – subject pronoun na
Root Link: ف ت ر