Al-Baqarah - 2:42

وَلاَ تَلْبِسُواْ الْحَقَّ بِالْبَاطِلِ وَتَكْتُمُواْ الْحَقَّ وَأَنتُمْ تَعْلَمُونَ
[2:42]
And do not mix up the truth with the falsehood, nor hide the truth while you know (it).
And cover not Truth with falsehood, nor conceal the Truth when ye know (what it is).
Confound not truth with falsehood, nor knowingly conceal the truth.