Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “Allah marvels at people who enter Paradise in chains.”
Source: Ṣaḥīḥ al-Bukhārī 3010
Grade: Sahih (authentic) according to Al-Bukhari
Ibn al-Jawzi said, “It means they are taken prisoner and detained, but when they recognize the rightness of Islam, they embrace it willingly and enter Paradise.”
Source: Fatḥ al-Bārī 6/145
عَنْ أَبِي هُرَيْرَةَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ عَجِبَ اللَّهُ مِنْ قَوْمٍ يَدْخُلُونَ الْجَنَّةَ فِي السَّلَاسِلِ
3010 صحيح البخاري كتاب الجهاد والسير باب الأسارى في السلاسل
قَالَ ابْنُ الْجَوْزِيِّ مَعْنَاهُ أَنَّهُمْ أُسِرُوا وَقُيِّدُوا فَلَمَّا عَرَفُوا صِحَّةَ الْإِسْلَامِ دَخَلُوا طَوْعًا فَدَخَلُوا الْجَنَّةَ
6/145 فتح الباري شرح صحيح البخاري