(Az-Zukhuruf) 43 : 64
إِنَّ اللَّهَ هُوَ رَبِّي وَرَبُّكُمْ فَاعْبُدُوهُ ۚ هَٰذَا صِرَاطٌ مُسْتَقِيمٌ
“Indeed, Allah—He is my Lord and your Lord—so serve Him; this is the Straightpath.”
All 313 Messengers, including Muhammad and Jesus, told mankind this. See explanation 3: 51, 101; and 6: 153.