Surat Fussilat (Explained in detail) - فصلت

إِذْ جَآءَتْهُمُ ٱلرُّسُلُ مِنۢ بَيْنِ أَيْدِيهِمْ وَمِنْ خَلْفِهِمْ أَلَّا تَعْبُدُوٓا۟ إِلَّا ٱللَّهَ قَالُوا۟ لَوْ شَآءَ رَبُّنَا لَأَنزَلَ مَلَٰٓئِكَةً فَإِنَّا بِمَآ أُرْسِلْتُم بِهِۦ كَٰفِرُونَ ﴿١٤﴾

When their apostles came to them from before them and from behind them, saying, Serve nothing but Allah, they said: If our Lord had pleased He would certainly have sent down angels, so we are surely unbelievers in that with which you are sent.