Mishkat al-Masabih 21 Foods كتاب الأطعمة 33

وَعَنْهَا قَالَتْ: تُوُفِّيَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَمَا شَبِعْنَا مِنَ الأسودين

She said that up to the death of God’s messenger they did not have a full meal of dates and water. [Literally, the two black things.] (Bukhari and Muslim.)