(Al-An'aam) 6 : 8
وَقَالُوا لَوْلَا أُنْزِلَ عَلَيْهِ مَلَكٌ ۖ وَلَوْ أَنْزَلْنَا مَلَكًا لَقُضِيَ الْأَمْرُ ثُمَّ لَا يُنْظَرُونَ
And they ask: "Why an Angel is not sent down upon him?" And if We had sent an Angel down, surely the command would have been implemented, then they would not be given respite.