Al-Muzzammil 73:8
وَٱذْكُرِ ٱسْمَ رَبِّكَ وَتَبَتَّلْ إِلَيْهِ تَبْتِيلًا
Wathkuri isma rabbikawatabattal ilayhi tabteela
"And remember the name of your Lord and devote yourself to Him with [complete] devotion."
Al-Muzzammil 73:8, translation by Sahih International
A short reflection
Remember the name of your Lord, and devote yourself to Him with complete devotion.