حَدَّثَنَا مُعَلَّى بْنُ أَسَدٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا الأَعْمَشُ، قَالَ ذَكَرْنَا عِنْدَ إِبْرَاهِيمَ الرَّهْنَ فِي السَّلَمِ فَقَالَ حَدَّثَنِي الأَسْوَدُ عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم اشْتَرَى طَعَامًا مِنْ يَهُودِيٍّ إِلَى أَجَلٍ، وَرَهَنَهُ دِرْعًا مِنْ حَدِيدٍ‏.‏
Translation
Narrated Qatada

Anas went to the Prophet (ﷺ) with barley bread having some dissolved fat on it. The Prophet (ﷺ) had mortgaged his armor to a Jew in Medina and took from him some barley for his family. Anas heard him saying, "The household of Muhammad did not possess even a single Sa of wheat or food grains for the evening meal, although he has nine wives to look after." (See Hadith No. 685)