Ransom of Captives in the Holy Quran

﴿ يَٰٓأَيُّهَا ٱلنَّبِيُّ قُل لِّمَن فِيٓ أَيۡدِيكُم مِّنَ ٱلۡأَسۡرَىٰٓ إِن يَعۡلَمِ ٱللَّهُ فِي قُلُوبِكُمۡ خَيۡرٗا يُؤۡتِكُمۡ خَيۡرٗا مِّمَّآ أُخِذَ مِنكُمۡ وَيَغۡفِرۡ لَكُمۡۚ وَٱللَّهُ غَفُورٞ رَّحِيمٞ * وَإِن يُرِيدُواْ خِيَانَتَكَ فَقَدۡ خَانُواْ ٱللَّهَ مِن قَبۡلُ فَأَمۡكَنَ مِنۡهُمۡۗ وَٱللَّهُ عَلِيمٌ حَكِيمٌ ﴾ [Al-Anfāl: 70-71]

(70) O Prophet, say to whoever is in your hands of the captives, "If Allah knows [any] good in your hearts, He will give you [something] better than what was taken from you, and He will forgive you; and Allah is Forgiving and Merciful."

(71) But if they intend to betray you - then they have already betrayed Allah before, and He empowered [you] over them. And Allah is Knowing and Wise.

Surah: Al-Anfāl - Verse: 70-71 - Juz: 10 - Page: 186

﴿فَإِذَا لَقِيتُمُ ٱلَّذِينَ كَفَرُواْ فَضَرۡبَ ٱلرِّقَابِ حَتَّىٰٓ إِذَآ أَثۡخَنتُمُوهُمۡ فَشُدُّواْ ٱلۡوَثَاقَ فَإِمَّا مَنَّۢا بَعۡدُ وَإِمَّا فِدَآءً حَتَّىٰ تَضَعَ ٱلۡحَرۡبُ أَوۡزَارَهَاۚ ذَٰلِكَۖ وَلَوۡ يَشَآءُ ٱللَّهُ لَٱنتَصَرَ مِنۡهُمۡ وَلَٰكِن لِّيَبۡلُوَاْ بَعۡضَكُم بِبَعۡضٖۗ وَٱلَّذِينَ قُتِلُواْ فِي سَبِيلِ ٱللَّهِ فَلَن يُضِلَّ أَعۡمَٰلَهُمۡ ﴾ [Muḥammad: 4]

(4) So when you meet those who disbelieve [in battle], strike [their] necks until, when you have inflicted slaughter upon them, then secure their bonds, and either [confer] favor afterwards or ransom [them] until the war lays down its burdens. That [is the command]. And if Allah had willed, He could have taken vengeance upon them [Himself], but [He ordered armed struggle] to test some of you by means of others. And those who are killed in the cause of Allah - never will He waste their deeds.

Surah: Muḥammad - Verse: 4 - Juz: 26 - Page: 507