Al-Muzzammil · Ayah 8
وَٱذْكُرِ ٱسْمَ رَبِّكَ وَتَبَتَّلْ إِلَيْهِ تَبْتِيلًا
And remember the name of your Lord and devote yourself to Him with [complete] devotion.
Quran 73:8 (Al-Muzzammil) · Saheeh International, Noor International Center (QuranEnc v1.1.2)