Surah Al-Ma'arij, ayah 34

وَٱلَّذِينَ هُمۡ عَلَىٰ صَلَاتِهِمۡ يُحَافِظُونَ ٣٤

Walladhīna hum 'alā salātihim yuhāfizūn

And those who [carefully] maintain their prayer: