Ash-Shama'il Al-Muhammadiyah, Book 26, Hadith 161 (In-Book)

Jaabir bin Taariq Radiyallahu 'Anhu says: "I attended the assembly of Rasulullah Sallallahu 'Alayhi Wasallam. I observed, they were busy cutting a gourd into pieces. I inquired: 'What shall be made of this'. He replied: 'It will add to our food'".

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ‏:‏ حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ إِسْمَاعِيلَ بْنُ أَبِي خَالِدٍ، عَنْ حَكِيمِ بْنِ جَابِرٍ، عَنْ أَبِيهِ، قَالَ‏:‏ دَخَلْتُ عَلَى النَّبِيِّ صلى الله عليه وسلم، فَرَأَيْتُ عِنْدَهُ دُبَّاءً يُقَطَّعُ، فَقُلْتُ‏:‏ مَا هَذَا‏؟‏ قَالَ‏:‏ نُكَثِّرُ بِهِ طَعَامَنَا‏.‏

also referenced under: Book 25, Hadith 152 (English)