Let those (disposing of an estate) have the same fear in their minds as they would have for their own if they had left a helpless family behind: Let them fear Allah, and speak words of appropriate (comfort).
The commentators explain this verse to mean that if a terminally ill person has purposely left some people out of his will who might be grieved and feel unfairly treated, he should be counseled gently to amend his will so he can leave this life while doing what is right. The Prophet said, “A man might do the deeds of the righteous for seventy years, but when it comes time to compile his will he commits injustice. So his final act will be his worst, and he will therefore enter the Fire. A man might do the deeds of the wicked for seventy years; yet, he is fair in his will, and so his final act will be his best. Therefore, he enters Paradise.” (Ahmad)
Emerick, Yahiya. The Meaning of the Holy Qur’an in Today’s English (p. 829). Unknown. Kindle Edition.