21:20
Al-Anbya 20
Surah Al-Anbya (الأنبياء), verse 20 — reference 21:20. Arabic text with optional translation and free audio on Al-Qalam.
يُسَبِّحُونَ ٱلَّيْلَ وَٱلنَّهَارَ لَا يَفْتُرُونَ
yusabbiḥūna al-layla wal-nahāra lā yafturūna
They exalt [Him] night and day [and] do not slacken.