57:8 · Al-Hadid
وَمَا لَكُمْ لَا تُؤْمِنُونَ بِاللَّهِ ۙ وَالرَّسُولُ يَدْعُوكُمْ لِتُؤْمِنُوا بِرَبِّكُمْ وَقَدْ أَخَذَ مِيثَاقَكُمْ إِنْ كُنْتُمْ مُؤْمِنِينَ
What cause have ye why ye should not believe in Allah?- and the Messenger invites you to believe in your Lord, and has indeed taken your Covenant, if ye are men of Faith.