Al-Baqarah - 2:181

فَمَن بَدَّلَهُ بَعْدَ مَا سَمِعَهُ فَإِنَّمَا إِثْمُهُ عَلَى الَّذِينَ يُبَدِّلُونَهُ إِنَّ اللّهَ سَمِيعٌ عَلِيمٌ
[2:181]
Whoever then alters it after he has heard it, the sin of it then is only upon those who alter it; surely Allah is Hearing, Knowing.
If anyone changes the bequest after hearing it, the guilt shall be on those who make the change. For Allah hears and knows (All things).
And whoso changeth (the will) after he hath heard it - the sin thereof is only upon those who change it. Lo! Allah is Hearer, Knower.