Monotheism (Tawhid) and rejection of polytheism

قُلْ صَدَقَ ٱللَّهُ ۗ فَٱتَّبِعُوا۟ مِلَّةَ إِبْرَٰهِيمَ حَنِيفًا وَمَا كَانَ مِنَ ٱلْمُشْرِكِينَ

Say, "Allāh has told the truth. So follow the religion of Abraham, inclining toward truth; and he was not of the polytheists."

وَإِنَّ ٱللَّهَ رَبِّى وَرَبُّكُمْ فَٱعْبُدُوهُ ۚ هَـٰذَا صِرَٰطٌ مُّسْتَقِيمٌ

[Jesus said], "And indeed, Allāh is my Lord and your Lord, so worship Him. That is a straight path."