﴿ وَمَا لَكُمْ لَا تُؤْمِنُونَ بِٱللَّهِ ۙ وَٱلرَّسُولُ يَدْعُوكُمْ لِتُؤْمِنُوا۟ بِرَبِّكُمْ وَقَدْ أَخَذَ مِيثَٰقَكُمْ إِن كُنتُم مُّؤْمِنِينَ ﴾

“And why should you not believe in God, seeing that the Apostle calls you to believe in [Him who is] your Sustainer, and [seeing that] He has taken a pledge from you? [Why should you not believe in Him] if you are able to believe [in anything]?”

Please check ayah 57:11 for complete tafsir.