فَمَنْۢ بَدَّلَهٗ بَعْدَمَا سَمِعَهٗ فَاِنَّمَآ اِثْمُهٗ عَلَى الَّذِيْنَ يُبَدِّلُوْنَهٗ ۗ اِنَّ اللّٰهَ سَمِيْعٌ عَلِيْمٌ ۗ ( البقرة: ١٨١ )
Famam baddalahoo ba'da maa sami'ahoo fa innamaaa ismuhoo 'alallazeena yubaddi loonah; innallaha Samee'un 'Aleem (al-Baq̈arah 2:181)
Then whoever alters it [i.e., the bequest] after he has heard it – the sin is only upon those who have altered it. Indeed, Allah is Hearing and Knowing. (Al-Baqarah  : 181)
1 Mufti Taqi Usmani
Then, whoever changes it after he has heard it, its sin will only be on those who change it. Surely, Allah is All-hearing, All-knowing.