I saw that the Prophet ﷺ took a piece of bread of barley and put a date on it and said: This is the condiment of this. (Using translation from Abū Dāʾūd 3830)
رَأَيْتُ النَّبِيَّ ﷺ أَخَذَ كِسْرَةً مِنْ خُبْزِ شَعِيرٍ فَوَضَعَ عَلَيْهَا تَمْرَةً وَقَالَ هَذِهِ إِدَامُ هَذِهِ فَأَكَلَهَا