Surah Al-Hadid — Ayah 8 (57:8)
وَمَا لَكُمۡ لَا تُؤۡمِنُونَ بِٱللَّهِ وَٱلرَّسُولُ يَدۡعُوكُمۡ لِتُؤۡمِنُواْ بِرَبِّكُمۡ وَقَدۡ أَخَذَ مِيثَٰقَكُمۡ إِن كُنتُم مُّؤۡمِنِينَ ٨
English translation (Saheeh International)
And why do you not believe in Allāh while the Messenger invites you to believe in your Lord and He has taken your covenant, if you should [truly] be believers?
Brief commentary
And what stops you from bringing faith in Allah, when the Messenger is calling you towards Allah hoping that you bring faith in your Lord (may He be glorified), and Allah has taken a covenant from you that will believe in Him when He took you out from the loins of your fathers? If you believe in that, then believe!