The Prophets
بَلْ قَالُوٓا۟ أَضْغَـٰثُ أَحْلَـٰمٍۭ بَلِ ٱفْتَرَىٰهُ بَلْ هُوَ شَاعِرٌ فَلْيَأْتِنَا بِـَٔايَةٍ كَمَآ أُرْسِلَ ٱلْأَوَّلُونَ
But they say, "[The revelation is but] a mixture of false dreams; rather, he has invented it; rather, he is a poet. So let him bring us a sign just as the previous [messengers] were sent [with miracles]."
Nearby ayahs help place verse 21:5 in sequence and meaning.
لَاهِيَةً قُلُوبُهُمْ ۗ وَأَسَرُّوا۟ ٱلنَّجْوَى ٱلَّذِينَ ظَلَمُوا۟ هَلْ هَـٰذَآ إِلَّا بَشَرٌ مِّثْلُكُمْ ۖ أَفَتَأْتُونَ ٱلسِّحْرَ وَأَنتُمْ تُبْصِرُونَ
With their hearts distracted. And those who do wrong conceal their private conversation, [saying], "Is this [Prophet] except a human being like you? So would you approach magic while you are aware [of it]?"
قَالَ رَبِّى يَعْلَمُ ٱلْقَوْلَ فِى ٱلسَّمَآءِ وَٱلْأَرْضِ ۖ وَهُوَ ٱلسَّمِيعُ ٱلْعَلِيمُ
The Prophet said, "My Lord knows whatever is said throughout the heaven and earth, and He is the Hearing, the Knowing."
مَآ ءَامَنَتْ قَبْلَهُم مِّن قَرْيَةٍ أَهْلَكْنَـٰهَآ ۖ أَفَهُمْ يُؤْمِنُونَ
Not a [single] city which We destroyed believed before them, so will they believe?
وَمَآ أَرْسَلْنَا قَبْلَكَ إِلَّا رِجَالًا نُّوحِىٓ إِلَيْهِمْ ۖ فَسْـَٔلُوٓا۟ أَهْلَ ٱلذِّكْرِ إِن كُنتُمْ لَا تَعْلَمُونَ
And We sent not before you, [O Muhammad], except men to whom We revealed [the message], so ask the people of the message if you do not know.