21:20
يُسَبِّحُونَ ٱلَّيْلَ وَٱلنَّهَارَ لَا يَفْتُرُونَ
yusabbiḥūna al-layla wal-nahāra lā yafturūna
They exalt [Him] night and day [and] do not slacken.
— Saheeh International
they glorify Him tirelessly night and day.
— M. A. S. Abdel Haleem
They (i.e. the angels) glorify His Praises night and day, (and) they never slacken (to do so).
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali