Arabic (Original)
حَدَّثَنَا عُبَيْدَةُ عَنْ حُمَيْدٍ الطَّوِيلِ عَنْ أَنَسِ بْنِ مَالِكٍ قَالَ خَرَجَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي غَدَاةٍ قَرَّةٍ أَوْ بَارِدَةٍ فَإِذَا الْمُهَاجِرُونَ وَالْأَنْصَارُ يَحْفِرُونَ الْخَنْدَقَ فَقَالَ اللَّهُمَّ إِنَّ الْخَيْرَ خَيْرُ الْآخِرَهْ فَاغْفِرْ لِلْأَنْصَارِ وَالْمُهَاجِرَهْ فَأَجَابُوهُ نَحْنُ الَّذِينَ بَايَعُوا مُحَمَّدًا عَلَى الْجِهَادِ مَا بَقِينَا أَبَدًا.
English Translation
Ubaydah narrated to us, from Humayd al-Tawil, from Anas ibn Malik, who said: The Prophet, peace and blessings be upon him, went out on a cold morning, and there were the Emigrants and the Ansar digging the trench, so he said: "O Allah, indeed the good is the good of the Hereafter, so forgive the Ansar and the Emigrants." And they answered him: "We are the ones who pledged allegiance to Muhammad for jihad as long as we remain, forever."