﴿ يُسَبِّحُونَ ٱلَّيْلَ وَٱلنَّهَارَ لَا يَفْتُرُونَ ﴾

“they extol His lim­itless glory by night and by day, never flagging [therein].”

(They glorify (Him) night and day) they pray to Him at night and during the day; (they flag not) they do not get bored of worshipping Allah and of acknowledging His Lordship.