‎وَلَا تَكْتُمُوا الشَّهَادَةَ ۚ وَمَنْ يَكْتُمْهَا فَإِنَّهُ آثِمٌ قَلْبُهُ ۗ وَاللَّهُ بِمَا تَعْمَلُونَ عَلِيمٌ

And conceal not the evidence for he, who hides it, surely his heart is sinful. And Allah is All-Knower of what you do.