2:181
فَمَنۢ بَدَّلَهُۥ بَعْدَ مَا سَمِعَهُۥ فَإِنَّمَآ إِثْمُهُۥ عَلَى ٱلَّذِينَ يُبَدِّلُونَهُۥٓ ۚ إِنَّ ٱللَّهَ سَمِيعٌ عَلِيمٌ
faman baddalahu baʿdamā samiʿahu fa-innamā ith'muhu ʿalā alladhīna yubaddilūnahu inna al-laha sami'un alimun
If anyone alters the bequest after hearing it, the guilt of the alteration will fall on them: God is all hearing and all knowing.
Then whoever changes the bequest after hearing it, the sin shall be on those who make the change. Truly, Allâh is All-Hearer, All-Knower.