The Cow
فِى قُلُوبِهِم مَّرَضٌ فَزَادَهُمُ ٱللَّهُ مَرَضًا ۖ وَلَهُمْ عَذَابٌ أَلِيمٌۢ بِمَا كَانُوا۟ يَكْذِبُونَ
In their hearts is disease, so Allah has increased their disease; and for them is a painful punishment because they [habitually] used to lie.
Nearby ayahs help place verse 2:10 in sequence and meaning.
وَمِنَ ٱلنَّاسِ مَن يَقُولُ ءَامَنَّا بِٱللَّهِ وَبِٱلْيَوْمِ ٱلْـَٔاخِرِ وَمَا هُم بِمُؤْمِنِينَ
And of the people are some who say, "We believe in Allah and the Last Day," but they are not believers.
يُخَـٰدِعُونَ ٱللَّهَ وَٱلَّذِينَ ءَامَنُوا۟ وَمَا يَخْدَعُونَ إِلَّآ أَنفُسَهُمْ وَمَا يَشْعُرُونَ
They [think to] deceive Allah and those who believe, but they deceive not except themselves and perceive [it] not.
وَإِذَا قِيلَ لَهُمْ لَا تُفْسِدُوا۟ فِى ٱلْأَرْضِ قَالُوٓا۟ إِنَّمَا نَحْنُ مُصْلِحُونَ
And when it is said to them, "Do not cause corruption on the earth," they say, "We are but reformers."
أَلَآ إِنَّهُمْ هُمُ ٱلْمُفْسِدُونَ وَلَـٰكِن لَّا يَشْعُرُونَ
Unquestionably, it is they who are the corrupters, but they perceive [it] not.