And let those [executors and guardians] fear [injustice] as if they [themselves] (4:9)

﴿وَلْيَخْشَ الَّذِينَ لَوْ تَرَكُوا مِنْ خَلْفِهِمْ ذُرِّيَّةً ضِعَافًا خَافُوا عَلَيْهِمْ فَلْيَتَّقُوا اللَّهَ وَلْيَقُولُوا قَوْلًا سَدِيدًا﴾
[ النساء: 9]

4:9 And let those [executors and guardians] fear [injustice] as if they [themselves] had left weak offspring behind and feared for them. So let them fear Allah and speak words of appropriate justice.

Let those executors and guardians fear in the manner they would if they had died and left young, weak children behind them, fearing they would be ruined.
Let them be mindful of orphans under their guardianship, not doing any wrong to them.
So that Allah brings about others to treat well their own children after they die, as they treated the orphans well.
Let whoever is present at the making of will, say what is right for the children, so that the heirs are not wronged in the will.
Nor should the giver deprive himself of this good deed by not leaving a will.

And let those (executors and guardians) have the same fear in their minds as they would have for their own, if they had left weak offspring behind. So let them fear Allah and speak right words.

phonetic Transliteration

Walyakhsha allatheena law tarakoo min khalfihim thurriyyatan diAAafan khafoo AAalayhim falyattaqoo Allaha walyaqooloo qawlan sadeedan

Abdullah Yusuf Ali - Translation

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).

Safi-ur-Rahman al-Mubarakpuri

And let those (executors and guardians) have the same fear in their minds as they would have for their own, if they had left weak offspring behind. So, let them have Taqwa of Allah and speak truthfully.

Page 78 English transliteration