No doubt, the Prophet ﷺ mortgaged his armor for barley grams. Once I took barley bread with some dissolved fat on it to the Prophet ﷺ and I heard him saying, "The household of Muhammad did not possess except a Sa (of food grain, barley, etc.) for both the morning and the evening meals although they were nine houses."  

وَلَقَدْ رَهَنَ النَّبِيُّ ﷺ دِرْعَهُ بِشَعِيرٍ وَمَشَيْتُ إِلَى النَّبِيِّ ﷺ بِخُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ وَلَقَدْ سَمِعْتُهُ يَقُولُ مَا أَصْبَحَ لآلِ مُحَمَّدٍ ﷺ إِلاَّ صَاعٌ وَلاَ أَمْسَى وَإِنَّهُمْ لَتِسْعَةُ أَبْيَاتٍ  

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)  

أَنَّهُ مَشَى إِلَى النَّبِيِّ ﷺ بِخُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ وَلَقَدْ رَهَنَ النَّبِيُّ ﷺ دِرْعًا لَهُ بِالْمَدِينَةِ عِنْدَ يَهُودِيٍّ وَأَخَذَ مِنْهُ شَعِيرًا لأَهْلِهِ وَلَقَدْ سَمِعْتُهُ يَقُولُ مَا أَمْسَى عِنْدَ آلِ مُحَمَّدٍ ﷺ صَاعُ بُرٍّ وَلاَ صَاعُ حَبٍّ وَإِنَّ عِنْدَهُ لَتِسْعَ نِسْوَةٍ  

[Machine] The Prophet of Allah ﷺ was once invited to eat barley bread and some coarse meal. He said, "One day, I heard him say, 'By the One in whose hand is the soul of Muhammad, the family of Muhammad has not had a measure full of wheat or dates in the morning for some time now. Indeed, on that day, he pledged a coat of armor with a Jew in Medina in exchange for food, but he could not find anything to pawn it for."  

لَقَدْ دُعِيَ نَبِيُّ اللهِ ﷺ ذَاتَ يَوْمٍ عَلَى خُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ قَالَ وَلَقَدْ سَمِعْتُهُ ذَاتَ يَوْمِ الْمِرَارِ وَهُوَ يَقُولُ وَالَّذِي نَفْسُمُحَمَّدٍ بِيَدِهِ مَا أَصْبَحَ عِنْدَ آلِ مُحَمَّدٍ صَاعُ حَبٍّ وَلَا صَاعُ تَمْرٍ وَإِنَّ لَهُ يَوْمَئِذٍ لَتِسْعَ نِسْوَةٍ وَلَقَدْ رَهَنَ دِرْعًا لَهُ عِنْدَ يَهُودِيٍّ بِالْمَدِينَةِ أَخَذَ مِنْهُ طَعَامًا فَمَا وَجَدَ لَهَا مَا يَفْتَكُّهَا بِهِ  

[Machine] He walked to the Messenger of Allah ﷺ with barley bread and a bunch of dates. He had pledged his shield with a Jew, so he took some barley for his family. I heard him saying one day that Abdul Samad said, "This is repeated every evening: There is no suhur with the family of Muhammad a sa'a of wheat or barley, and he had nine wives at that time."  

أَنَّهُ مَشَى إِلَى رَسُولِ اللهِ ﷺ بِخُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ وَلَقَدْ رَهَنَ دِرْعَهُ لَهُ عِنْدَ يَهُودِيٍّ فَأَخَذَ شَعِيرًا لِأَهْلِهِ وَلَقَدْ سَمِعْتُهُ ذَاتَ يَوْمٍ يَقُولُ قَالَ عَبْدُ الصَّمَدِ يَقُولُ ذَلِكَ مِرَارًا مَا أَمْسَى عِنْدَ آلِ مُحَمَّدٍ صَاعُ بُرٍّ وَلَا صَاعُ حَبٍّ وَإِنَّ عِنْدَهُ تِسْعَ نِسْوَةٍ حِينَئِذٍ  

[Machine] "He went to the Prophet ﷺ with barley bread and a container of fat. He said, 'The Messenger of Allah ﷺ had pawned his armor with a Jew in Medina, so he took some barley from him for his family. I heard him say one day, 'What a family of Muhammad has in the evening is not even a handful of grains or a handful of dates, and they have only nine neighbors.'''  

أَنَّهُ مَشَى إِلَى النَّبِيِّ ﷺ بِخُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ قَالَ وَقَدْ رَهَنَ رَسُولُ اللهِ ﷺ دِرْعًا لَهُ عِنْدَ يَهُودِيٍّ بِالْمَدِينَةِ فَأَخَذَ مِنْهُ شَعِيرًا لِأَهْلِهِ قَالَ وَلَقَدْ سَمِعْتُهُ ذَاتَ يَوْمٍ يَقُولُ مَا أَمْسَى عِنْدَ آلِ مُحَمَّدٍ صَاعُ حَبٍّ وَلَا صَاعُ بُرٍّ وَإِنَّ عِنْدَهُ تِسْعَنِسْوَةٍ يَوْمَئِذٍ  

[Machine] He walked to the Messenger of Allah ﷺ with a loaf of barley bread and a container filled with dates. The Messenger of Allah ﷺ had pledged his armor to a Jew in Medina, so he took some barley to his family. One morning, I heard him say, "The family of Muhammad had nothing to eat today, not even a sa' of dates or a sa' of barley, while I have nine wives." Shaiban bin AbdulRahman narrated this hadith from Qatadah, and mentioned that the incident took place in Medina.  

أَنَّهُ مَشَى إِلَى رَسُولِ اللهِ ﷺ بِخُبْزِ شَعِيرٍ وَإِهَالَةٍ سَنِخَةٍ قَالَ وَقَدْ رَهَنَ رَسُولُ اللهِ ﷺ دِرْعًا لَهُ عِنْدَ يَهُودِيٍّ بِالْمَدِينَةِ فَأَخَذَ بِهِ شَعِيرًا لِأَهْلِهِ وَقَدْ سَمِعْتُهُ ذَاتَ غَدَاةٍ يَقُولُ مَا أَصْبَحَ عِنْدَ آلِ مُحَمَّدٍ صَاعُ تَمْرٍ وَلَا صَاعُ شَعِيرٍ وَإِنَّ عِنْدَهُ لَتِسْعَ نِسْوَةٍ يَوْمَئِذٍ وَرَوَاهُ شَيْبَانُ بْنُ عَبْدِ الرَّحْمَنِ عَنْ قَتَادَةَ وَذَكَرَ فِيهِ قَوْلَهُ بِالْمَدِينَةِ  

[Machine] The Prophet ﷺ was invited to have barley bread and fat soup. I heard him one morning saying, "By the One in whose hand is the soul of Muhammad, the family of Muhammad did not have a sa' of wheat or dates in the morning. And indeed, on that day, he pledged his armor to a Jew in Medina for a sa' of barley, which was not enough for him or would not suffice him."  

دُعِيَ النَّبِيُّ ﷺ إِلَى خُبْزِ الشَّعِيرِ وَإِهَالَةٍ سَنِخَةٍ وَلَقَدْ سَمِعْتُهُ ذَاتَ غَدَاةٍ يَقُولُ وَالَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ مَا أَصْبَحَ عِنْدَ آلِ مُحَمَّدٍ صَاعُ حَبٍّ وَلَا صَاعُ تَمْرٍ وَإِنَّ لَهُ يَوْمَئِذٍ تِسْعَ نِسْوَةٍ وَلَقَدْ رَهَنَ يَوْمَئِذٍ دِرْعًا لَهُ عِنْدَ يَهُودِيٍّ بِالْمَدِينَةِ أَخَذَ مِنْهُ صَاعًا مَا وَجَدَ مَا يَكْفِيهِ أَوْ قَالَ مَا يَفْتَكُّهُ