The Believers - 23:47
"They said: "Shall we believe in two people like us while the people of those two were slaves to us?"
Why a human messenger?
The Night Journey/17:94
"When Hidayet came to them, the people said: "Has Allah sent a human being as a messenger?"
وَمَا مَنَعَ النَّاسَ اَنْ يُؤْمِنُٓوا اِذْ جَٓاءَهُمُ الْهُدٰٓى اِلَّٓا اَنْ قَالُٓوا اَبَعَثَ اللّٰهُ بَشَراً رَسُولاً
The Night Journey/17:95
"Say: "If there were angels inhabiting the earth, We would have sent to them an angel from heaven as a messenger."
قُلْ لَوْ كَانَ فِي الْاَرْضِ مَلٰٓئِكَةٌ يَمْشُونَ مُطْمَئِنّ۪ينَ لَنَزَّلْنَا عَلَيْهِمْ مِنَ السَّمَٓاءِ مَلَكاً رَسُولاً