Surah Al-Anbiya, ayah 20

يُسَبِّحُونَ ٱلَّيۡلَ وَٱلنَّهَارَ لَا يَفۡتُرُونَ ٢٠

Yusabbihūnal-layla wan-nahāra lā yafturūn

They exalt [Him] night and day [and] do not slacken.