4:3
وَإِنْ خِفْتُمْ أَلَّا تُقْسِطُوا۟ فِى ٱلْيَتَٰمَىٰ فَٱنكِحُوا۟ مَا طَابَ لَكُم مِّنَ ٱلنِّسَآءِ مَثْنَىٰ وَثُلَٰثَ وَرُبَٰعَ ۖ فَإِنْ خِفْتُمْ أَلَّا تَعْدِلُوا۟ فَوَٰحِدَةً أَوْ مَا مَلَكَتْ أَيْمَٰنُكُمْ ۚ ذَٰلِكَ أَدْنَىٰٓ أَلَّا تَعُولُوا۟
And if you fear that you will not deal justly with the orphan girls, then marry those that please you of [other] women, two or three or four. But if you fear that you will not be just, then [marry only] one or those your right hand possesses. That is more suitable that you may not incline [to injustice].
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Protecting the Property of the Orphans
Allah commands that the property of the orphans be surrendered to them in full when they reach the age of adolescence, and He forbids using or confiscating any part of it. So He said;
وَلاَ تَتَبَدَّلُواْ الْخَبِيثَ بِالطَّيِّبِ
(and do not exchange (your) bad things for (their) good ones;) Sa`id bin Al-Musayyib and Az-Zuhri commented, "Do not substitute a weak animal of yours for a fat animal (of the orphans)." Ibrahim An-Nakha`i and Ad-Dahhak commented, "Do not give something of bad quality for something of good quality." As-Suddi said, "One of them (caretakers of orphans) would take a fat sheep from the orphan's property and put in its place, a weak sheep of his, saying, `A sheep for a sheep.' He would also take a good Dirham and exchange it for a fake Dirham, saying, `A Dirham for a Dirham."' Allah's statement,
وَلاَ تَأْكُلُواْ أَمْوَلَهُمْ إِلَى أَمْوَلِكُمْ
(and devour not their substance to your substance.) means, do not mix them together so that you eat up both, as Mujahid, Sa`id bin Jubayr, Muqatil bin Hayyan, As-Suddi and Sufyan bin Hassin stated. Allah said,