It was narrated that Jabir said:

"I entered the house of the Prophet with him and there was some bread and vinegar. The Messenger of Allah said: 'Eat; what a good condiment is vinegar.'"

أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، قَالَ حَدَّثَنَا الْمُثَنَّى بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا طَلْحَةُ بْنُ نَافِعٍ، عَنْ جَابِرٍ، قَالَ دَخَلْتُ مَعَ النَّبِيِّ ﷺ بَيْتَهُ فَإِذَا فِلَقٌ وَخَلٌّ فَقَالَ رَسُولُ اللَّهِ ﷺ " كُلْ فَنِعْمَ الإِدَامُ الْخَلُّ " .