﴿ يَٰعِبَادِىَ ٱلَّذِينَ ءَامَنُوٓا۟ إِنَّ أَرْضِى وَٰسِعَةٌۭ فَإِيَّٰىَ فَٱعْبُدُونِ ﴾

“O YOU servants of Mine who have attained to faith! Behold, wide is Mine earth: worship Me, then, Me alone!”

(O my bondmen who believe) in Muhammad (pbuh) and in the Qur'an! i.e. Abu Bakr, 'Umar, 'Uthman, 'Ali and their fellow believers (Lo! My earth) the land of Medina (is spacious) is safe, therefore travel to it. (Therefore serve Me only) obey Me only.