2 verses have
Rabbul
in Edition English Transliteration / Al-Muminoon (The Believers)

23:86Qul mar Rabbus samaawaatis sab'i wa Rabbul 'Arshil 'Azeem

23:116Fata'aalal laahul Malikul Haqq; laaa ilaaha illaa Huwa Rabbul 'Arshil Kareem