That the Prophet ﷺ said: "What an excellent condiment vinegar is." There are narrations on this topic from 'Aishah and Umm Hani', and this is more correct than the narration of Mubarak bin Sa'eed (no. 1839).
عَنِ النَّبِيِّ ﷺ قَالَ نِعْمَ الإِدَامُ الْخَلُّ هَذَا أَصَحُّ مِنْ حَدِيثِ مُبَارَكِ بْنِ سَعِيدٍ