كتاب الزكاة
12  
The Book of Zakat
(20)
Chapter: Encouragement to give charity even if it is with half a date or a kind word. And charity is a shield against the fire.
(20)
باب الْحَثِّ عَلَى الصَّدَقَةِ وَلَوْ بِشِقِّ تَمْرَةٍ أَوْ كَلِمَةٍ طَيِّبَةٍ وَأَنَّهَا حِجَابٌ مِنْ النَّارِ
Sahih Muslim 1016 b

'Adi b. Hatim reported Allah's Messenger (ﷺ) as saying:

Allah will speak with everyone amongst you without any interpreter between them. He (the man) would see towards his right and would not find anything but (the deeds) which he had done before, and he would see towards the left and would not find anything but (the deeds) which he had done before. He would see in front of him and would find nothing but Fire just before his face. So protect (yourselves) against Fire even if it is with the help of half a date. A hadith like this has been transmitted by Khaithama and addition has been made in this of (these words) ;" Even if it is with a good word."
حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ السَّعْدِيُّ، وَإِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَعَلِيُّ بْنُ خَشْرَمٍ، قَالَ ابْنُ حُجْرٍ حَدَّثَنَا وَقَالَ الآخَرَانِ، أَخْبَرَنَا عِيسَى بْنُ يُونُسَ، حَدَّثَنَا الأَعْمَشُ، عَنْ خَيْثَمَةَ، عَنْ عَدِيِّ، بْنِ حَاتِمٍ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَا مِنْكُمْ مِنْ أَحَدٍ إِلاَّ سَيُكَلِّمُهُ اللَّهُ لَيْسَ بَيْنَهُ وَبَيْنَهُ تُرْجُمَانٌ فَيَنْظُرُ أَيْمَنَ مِنْهُ فَلاَ يَرَى إِلاَّ مَا قَدَّمَ وَيَنْظُرُ أَشْأَمَ مِنْهُ فَلاَ يَرَى إِلاَّ مَا قَدَّمَ وَيَنْظُرُ بَيْنَ يَدَيْهِ فَلاَ يَرَى إِلاَّ النَّارَ تِلْقَاءَ وَجْهِهِ فَاتَّقُوا النَّارَ وَلَوْ بِشِقِّ تَمْرَةٍ ‏"‏ ‏.‏ زَادَ ابْنُ حُجْرٍ قَالَ الأَعْمَشُ وَحَدَّثَنِي عَمْرُو بْنُ مُرَّةَ عَنْ خَيْثَمَةَ مِثْلَهُ وَزَادَ فِيهِ ‏"‏ وَلَوْ بِكَلِمَةٍ طَيِّبَةٍ ‏"‏ ‏.‏ وَقَالَ إِسْحَاقُ قَالَ الأَعْمَشُ عَنْ عَمْرِو بْنِ مُرَّةَ عَنْ خَيْثَمَةَ ‏.‏
Reference : Sahih Muslim 1016b
In-book reference : Book 12, Hadith 85
USC-MSA web (English) reference : Book 5, Hadith 2216
  (deprecated numbering scheme)