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'".
English reference: Book 25, Hadith 152
Arabic reference: Book 26, Hadith 161