43:17
وَإِذَا بُشِّرَ أَحَدُهُم بِمَا ضَرَبَ لِلرَّحْمَـٰنِ مَثَلًا ظَلَّ وَجْهُهُۥ مُسْوَدًّا وَهُوَ كَظِيمٌ
And when one of them is given good tidings of that which he attributes to the Most Merciful in comparison, his face becomes dark, and he suppresses grief.
Context in Surah Az-Zukhruf
Nearby ayahs help place verse 43:17 in sequence and meaning.
وَجَعَلُوا۟ لَهُۥ مِنْ عِبَادِهِۦ جُزْءًا ۚ إِنَّ ٱلْإِنسَـٰنَ لَكَفُورٌ مُّبِينٌ
But they have attributed to Him from His servants a portion. Indeed, man is clearly ungrateful.
أَمِ ٱتَّخَذَ مِمَّا يَخْلُقُ بَنَاتٍ وَأَصْفَىٰكُم بِٱلْبَنِينَ
Or has He taken, out of what He has created, daughters and chosen you for [having] sons?
أَوَمَن يُنَشَّؤُا۟ فِى ٱلْحِلْيَةِ وَهُوَ فِى ٱلْخِصَامِ غَيْرُ مُبِينٍ
So is one brought up in ornaments while being during conflict unevident [attributed to Allah]?
وَجَعَلُوا۟ ٱلْمَلَـٰٓئِكَةَ ٱلَّذِينَ هُمْ عِبَـٰدُ ٱلرَّحْمَـٰنِ إِنَـٰثًا ۚ أَشَهِدُوا۟ خَلْقَهُمْ ۚ سَتُكْتَبُ شَهَـٰدَتُهُمْ وَيُسْـَٔلُونَ
And they have made the angels, who are servants of the Most Merciful, females. Did they witness their creation? Their testimony will be recorded, and they will be questioned.