The Ants
وَأَدْخِلْ يَدَكَ فِى جَيْبِكَ تَخْرُجْ بَيْضَآءَ مِنْ غَيْرِ سُوٓءٍ ۖ فِى تِسْعِ ءَايَـٰتٍ إِلَىٰ فِرْعَوْنَ وَقَوْمِهِۦٓ ۚ إِنَّهُمْ كَانُوا۟ قَوْمًا فَـٰسِقِينَ
And put your hand into the opening of your garment [at the breast]; it will come out white without disease. [These are] among the nine signs [you will take] to Pharaoh and his people. Indeed, they have been a people defiantly disobedient."
Nearby ayahs help place verse 27:12 in sequence and meaning.
وَأَلْقِ عَصَاكَ ۚ فَلَمَّا رَءَاهَا تَهْتَزُّ كَأَنَّهَا جَآنٌّ وَلَّىٰ مُدْبِرًا وَلَمْ يُعَقِّبْ ۚ يَـٰمُوسَىٰ لَا تَخَفْ إِنِّى لَا يَخَافُ لَدَىَّ ٱلْمُرْسَلُونَ
And [he was told], "Throw down your staff." But when he saw it writhing as if it were a snake, he turned in flight and did not return. [Allah said], "O Moses, fear not. Indeed, in My presence the messengers do not fear.
إِلَّا مَن ظَلَمَ ثُمَّ بَدَّلَ حُسْنًۢا بَعْدَ سُوٓءٍ فَإِنِّى غَفُورٌ رَّحِيمٌ
Otherwise, he who wrongs, then substitutes good after evil - indeed, I am Forgiving and Merciful.
فَلَمَّا جَآءَتْهُمْ ءَايَـٰتُنَا مُبْصِرَةً قَالُوا۟ هَـٰذَا سِحْرٌ مُّبِينٌ
But when there came to them Our visible signs, they said, "This is obvious magic."
وَجَحَدُوا۟ بِهَا وَٱسْتَيْقَنَتْهَآ أَنفُسُهُمْ ظُلْمًا وَعُلُوًّا ۚ فَٱنظُرْ كَيْفَ كَانَ عَـٰقِبَةُ ٱلْمُفْسِدِينَ
And they rejected them, while their [inner] selves were convinced thereof, out of injustice and haughtiness. So see how was the end of the corrupters.