Sahih al-Bukhari 4557

Arabic

حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، عَنْ سُفْيَانَ، عَنْ مَيْسَرَةَ، عَنْ أَبِي حَازِمٍ، عَنْ أَبِي هُرَيْرَة َ ـ رضى الله عنه ـ ‏{‏كُنْتُمْ خَيْرَ أُمَّةٍ أُخْرِجَتْ لِلنَّاسِ‏}‏ قَالَ خَيْرَ النَّاسِ لِلنَّاسِ، تَأْتُونَ بِهِمْ فِي السَّلاَسِلِ فِي أَعْنَاقِهِمْ حَتَّى يَدْخُلُوا فِي الإِسْلاَمِ‏.‏

English translation

Narrated Abu Huraira:The Verse:--"You (true Muslims) are the best of peoples ever raised up for mankind." means, the best of peoples for the people, as you bring them with chains on their necks till they embrace Islam

Reference: Sahih al-Bukhari 4557, Book of Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh)). English translation by Dr. Muhammad Muhsin Khan.