Surah Al-Ma'arij, ayah 23

70:23

ٱلَّذِينَ هُمۡ عَلَىٰ صَلَاتِهِمۡ دَآئِمُونَ ٢٣

Alladhīna hum 'alā salātihim dā'imūn

Those who are constant in their prayer